bugzilla-data-all.json

{
  "high": {
    "bugs": [
      {
        "priority": "--",
        "component": "Password Manager",
        "keywords": [],
        "severity": "--",
        "status": "ASSIGNED",
        "op_sys": "All",
        "id": 1963814,
        "last_change_time": "2026-03-07T06:21:30Z",
        "summary": "Browser UI hang in sqlite3PagerSharedLock during LoginManagerCrypto decryption (via sqlite usage during NSC_DecryptInit for SDR crypto)",
        "creation_time": "2025-05-01T13:52:50Z"
      },
      {
        "priority": "P3",
        "component": "Widget: Cocoa",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW",
        "severity": "S3",
        "id": 1602842,
        "op_sys": "Unspecified",
        "summary": "OSXDisplay::EnableVsync hangs in CVDisplayLinkCreateWithActiveCGDisplays",
        "creation_time": "2019-12-10T17:22:25Z",
        "last_change_time": "2025-07-01T19:28:26Z"
      },
      {
        "priority": "--",
        "keywords": [
          "perf:responsiveness"
        ],
        "component": "Panning and Zooming",
        "severity": "S3",
        "status": "NEW",
        "last_change_time": "2025-05-28T19:20:30Z",
        "summary": "SendReceiveMouseInputEvent often blocks the main thread of the parent process",
        "creation_time": "2020-11-16T15:30:13Z",
        "op_sys": "Unspecified",
        "id": 1677509
      },
      {
        "status": "NEW",
        "severity": "S3",
        "summary": "Lazy font loading can still hang the main thread on Windows",
        "creation_time": "2021-01-26T19:14:50Z",
        "last_change_time": "2026-02-28T12:23:08Z",
        "id": 1688951,
        "op_sys": "Windows",
        "priority": "--",
        "keywords": [
          "perf:responsiveness"
        ],
        "component": "Layout: Text and Fonts"
      },
      {
        "priority": "--",
        "keywords": [
          "meta"
        ],
        "component": "Performance: General",
        "status": "NEW",
        "severity": "--",
        "last_change_time": "2025-03-11T08:41:57Z",
        "creation_time": "2021-01-28T16:03:57Z",
        "summary": "[Meta] investigate performance issues on Reddit.",
        "id": 1689392,
        "op_sys": "Unspecified"
      },
      {
        "priority": "P2",
        "component": "Web Audio",
        "keywords": [
          "perf:resource-use",
          "reproducible"
        ],
        "status": "NEW",
        "severity": "S3",
        "id": 1771179,
        "op_sys": "Unspecified",
        "creation_time": "2022-05-25T16:56:04Z",
        "summary": "AudioContext power optimizations",
        "last_change_time": "2025-11-26T06:43:39Z"
      },
      {
        "priority": "P2",
        "keywords": [
          "perf:resource-use",
          "perf:responsiveness",
          "reproducible"
        ],
        "component": "Performance",
        "status": "NEW",
        "severity": "S2",
        "last_change_time": "2025-03-10T23:42:15Z",
        "summary": "Fenix hangs and memory usage jumps on theguardian.com when opening headlines in new tab",
        "creation_time": "2022-08-31T21:19:22Z",
        "id": 1788530,
        "op_sys": "Unspecified"
      },
      {
        "keywords": [
          "webcompat:platform-bug"
        ],
        "component": "Graphics: WebRender",
        "priority": "--",
        "last_change_time": "2025-10-30T20:58:10Z",
        "creation_time": "2023-04-05T14:45:37Z",
        "summary": "CSS filter() with invert() and hue-rotate() results in sluggish scrolling on Wikipedia",
        "op_sys": "Android",
        "id": 1826576,
        "severity": "S3",
        "status": "NEW"
      },
      {
        "status": "NEW",
        "severity": "S3",
        "creation_time": "2023-08-18T17:52:57Z",
        "last_change_time": "2026-03-10T16:53:28Z",
        "summary": "Firefox regularly hangs for over half a second in SessionWriter.sys.mjs calling IOUtils.writeJSON serializing a massive JS object when saving tab state",
        "id": 1849393,
        "op_sys": "Unspecified",
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "component": "Session Restore"
      },
      {
        "last_change_time": "2026-03-10T13:09:47Z",
        "creation_time": "2024-06-19T11:50:31Z",
        "summary": "Frequent long janks on Android on loading certain pages",
        "op_sys": "Unspecified",
        "id": 1903530,
        "severity": "S2",
        "status": "NEW",
        "keywords": [],
        "component": "Storage: Quota Manager",
        "priority": "P2"
      },
      {
        "id": 1928948,
        "op_sys": "Windows 10",
        "last_change_time": "2025-03-20T03:11:36Z",
        "creation_time": "2024-11-04T09:34:27Z",
        "summary": "vizzy.io - The browser is slowed down and eventually stops responding",
        "status": "NEW",
        "severity": "S2",
        "component": "Site Reports",
        "keywords": [
          "webcompat:needs-contact",
          "webcompat:site-report"
        ],
        "priority": "P2"
      },
      {
        "status": "NEW",
        "severity": "S2",
        "id": 1963578,
        "op_sys": "Unspecified",
        "summary": "ChatGPT on clean Firefox install - \"This page is slowing down Firefox.\"",
        "last_change_time": "2026-02-25T19:39:41Z",
        "creation_time": "2025-04-30T12:23:32Z",
        "priority": "P1",
        "component": "JavaScript Engine",
        "keywords": []
      },
      {
        "component": "Performance: Navigation",
        "keywords": [
          "perf:pageload"
        ],
        "priority": "P3",
        "id": 1971873,
        "op_sys": "Android",
        "creation_time": "2025-06-12T19:54:27Z",
        "summary": "m.facebook.com live site loads 100-200ms slower in Fenix than Chrome",
        "last_change_time": "2025-07-04T18:23:19Z",
        "status": "NEW",
        "severity": "S3"
      },
      {
        "keywords": [
          "stalled"
        ],
        "component": "Graphics: WebRender",
        "priority": "--",
        "last_change_time": "2026-01-23T20:06:23Z",
        "creation_time": "2025-09-16T14:51:59Z",
        "summary": "Slow scrolling performance on particular sites (mastodon)",
        "op_sys": "Android",
        "id": 1988762,
        "severity": "S2",
        "status": "NEW"
      },
      {
        "severity": "S2",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1995805,
        "summary": "Fenix cold start applink navigation performance ~1500ms slower than warm, hot scenarios, p75",
        "last_change_time": "2025-11-19T22:29:16Z",
        "creation_time": "2025-10-22T15:48:12Z",
        "priority": "P3",
        "component": "Performance Engineering",
        "keywords": []
      },
      {
        "severity": "S2",
        "status": "NEW",
        "summary": "Jank and freezing on snowplowmap.a2gov.org",
        "creation_time": "2026-01-27T17:26:37Z",
        "last_change_time": "2026-03-13T20:09:45Z",
        "op_sys": "Unspecified",
        "id": 2012760,
        "priority": "--",
        "keywords": [],
        "component": "Layout"
      },
      {
        "priority": "--",
        "keywords": [
          "perf:responsiveness",
          "perf:startup",
          "reproducible"
        ],
        "component": "Crash Reporting",
        "severity": "S3",
        "status": "REOPENED",
        "summary": "ContentParent::KillHard janks the main thread",
        "last_change_time": "2026-02-11T20:34:10Z",
        "creation_time": "2019-05-10T14:52:25Z",
        "op_sys": "Unspecified",
        "id": 1550754
      }
    ]
  },
  "medium": {
    "bugs": [
      {
        "component": "Graphics: WebRender",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P3",
        "op_sys": "All",
        "id": 1626816,
        "creation_time": "2020-04-02T00:26:08Z",
        "last_change_time": "2025-10-06T13:53:06Z",
        "summary": "WebRender program cache / shader initialization blocks the main thread via the sync IPC message PWebRenderBridge::EnsureConnected (25ms-40ms startup penalty)",
        "severity": "S3",
        "status": "ASSIGNED"
      },
      {
        "keywords": [],
        "component": "JavaScript Engine: JIT",
        "priority": "P3",
        "creation_time": "2024-10-01T18:43:40Z",
        "summary": "js::jit::GenerateCode spends a lot of time in malloc lock contention",
        "last_change_time": "2025-01-06T15:03:33Z",
        "op_sys": "Android",
        "id": 1922073,
        "severity": "S3",
        "status": "ASSIGNED"
      },
      {
        "keywords": [
          "perf"
        ],
        "component": "Layout",
        "priority": "--",
        "last_change_time": "2023-05-15T19:04:00Z",
        "creation_time": "2003-08-17T03:26:28Z",
        "summary": "Page with lots of <pre> text (or rather: extremely deeply-nested inline tags, with lots of linebreaks) uses lots of memory in layout arenas and is slow to load",
        "id": 216418,
        "op_sys": "All",
        "status": "NEW",
        "severity": "S3"
      },
      {
        "priority": "--",
        "component": "Graphics: ImageLib",
        "keywords": [
          "perf:pageload",
          "perf:resource-use",
          "perf:responsiveness",
          "reproducible"
        ],
        "status": "NEW",
        "severity": "S3",
        "id": 304683,
        "op_sys": "All",
        "creation_time": "2005-08-15T08:01:49Z",
        "last_change_time": "2024-09-04T13:05:12Z",
        "summary": "firefox struggles with large doxygen html file in nsLocalFile::GetLastModifiedTime (from imgLoader)"
      },
      {
        "component": "XML",
        "keywords": [
          "perf:pageload"
        ],
        "priority": "--",
        "op_sys": "All",
        "id": 651049,
        "creation_time": "2011-04-19T08:20:35Z",
        "last_change_time": "2023-08-23T01:33:13Z",
        "summary": "Write a new off-the-main-thread IO driver for expat",
        "severity": "S3",
        "status": "NEW"
      },
      {
        "component": "Graphics: ImageLib",
        "keywords": [
          "perf:pageload",
          "perf:resource-use",
          "reproducible",
          "testcase-wanted"
        ],
        "priority": "--",
        "id": 1027106,
        "op_sys": "All",
        "creation_time": "2014-06-18T15:22:41Z",
        "last_change_time": "2025-02-09T16:16:28Z",
        "summary": "Make ImageLib share cached imgRequests for the same SVG document even if the URI has a different ref/hash",
        "status": "NEW",
        "severity": "S3"
      },
      {
        "op_sys": "All",
        "id": 1037984,
        "summary": "Website causes Firefox to completely hang because same script file is getting loaded over and over again",
        "last_change_time": "2024-06-04T18:21:25Z",
        "creation_time": "2014-07-13T16:33:17Z",
        "severity": "S3",
        "status": "NEW",
        "component": "New Tab Page",
        "keywords": [
          "csectype-dos",
          "hang",
          "memory-leak",
          "perf:responsiveness",
          "reproducible",
          "testcase"
        ],
        "priority": "P2"
      },
      {
        "summary": "Evaluate aggregating timers to reduce the number of times we wake up the CPU for serving them",
        "last_change_time": "2025-03-27T16:27:51Z",
        "creation_time": "2014-12-04T20:16:51Z",
        "op_sys": "All",
        "id": 1107626,
        "severity": "S4",
        "status": "NEW",
        "keywords": [
          "perf:resource-use"
        ],
        "component": "DOM: Core & HTML",
        "priority": "P5"
      },
      {
        "id": 1162698,
        "op_sys": "All",
        "summary": "Thumbnail generation should have a time limit",
        "creation_time": "2015-05-07T20:09:26Z",
        "last_change_time": "2023-07-24T12:16:09Z",
        "status": "NEW",
        "severity": "--",
        "component": "New Tab Page",
        "keywords": [
          "memory-footprint",
          "memory-leak",
          "perf",
          "perf:responsiveness",
          "top-memory-leak"
        ],
        "priority": "P3"
      },
      {
        "severity": "S3",
        "status": "NEW",
        "op_sys": "All",
        "id": 1304389,
        "last_change_time": "2025-12-04T06:38:11Z",
        "creation_time": "2016-09-21T13:54:15Z",
        "summary": "Session Restore generates sustained large disk traffic [meta]",
        "priority": "--",
        "component": "Session Restore",
        "keywords": [
          "meta",
          "perf:animation",
          "perf:resource-use",
          "perf:responsiveness",
          "reproducible"
        ]
      },
      {
        "creation_time": "2017-03-18T03:14:39Z",
        "summary": "Consider using FramePropertyTable less in layout",
        "last_change_time": "2022-10-11T19:06:39Z",
        "id": 1348469,
        "op_sys": "Unspecified",
        "status": "NEW",
        "severity": "S3",
        "keywords": [
          "perf",
          "perf:pageload"
        ],
        "component": "Layout",
        "priority": "P3"
      },
      {
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "component": "Application Update",
        "priority": "P3",
        "last_change_time": "2022-10-11T19:07:40Z",
        "summary": "getElevationRequired janks the parent process by doing IO on the main thread",
        "creation_time": "2017-03-23T02:16:50Z",
        "op_sys": "macOS",
        "id": 1349809,
        "severity": "S3",
        "status": "NEW"
      },
      {
        "status": "NEW",
        "severity": "S3",
        "summary": "Showing the bookmarks panel is too slow the first time",
        "last_change_time": "2024-04-03T13:53:20Z",
        "creation_time": "2017-05-08T18:35:31Z",
        "id": 1363131,
        "op_sys": "Unspecified",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "component": "Bookmarks & History"
      },
      {
        "keywords": [
          "meta",
          "perf",
          "perf:responsiveness",
          "perf:startup"
        ],
        "component": "XPCOM",
        "priority": "--",
        "creation_time": "2017-05-10T02:24:10Z",
        "summary": "[meta] Creating the XPCOM system info service shouldn't be expensive",
        "last_change_time": "2025-03-24T22:09:33Z",
        "op_sys": "Unspecified",
        "id": 1363586,
        "severity": "S3",
        "status": "NEW"
      },
      {
        "summary": "Defer mozilla::widget::AudioSession::Start() until later in startup",
        "creation_time": "2017-05-11T14:44:03Z",
        "last_change_time": "2022-10-11T19:17:24Z",
        "op_sys": "Unspecified",
        "id": 1364091,
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf",
          "perf:responsiveness",
          "perf:startup"
        ],
        "component": "Widget: Win32",
        "priority": "P3"
      },
      {
        "summary": "NSS should be initialized off main thread",
        "last_change_time": "2023-12-11T13:17:23Z",
        "creation_time": "2017-06-06T12:51:51Z",
        "op_sys": "Unspecified",
        "id": 1370516,
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf:responsiveness",
          "perf:startup"
        ],
        "component": "Security: PSM",
        "priority": "P2"
      },
      {
        "priority": "P3",
        "component": "Toolbars and Customization",
        "keywords": [
          "perf:frontend",
          "perf:startup",
          "regression",
          "regressionwindow-wanted"
        ],
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1374216,
        "creation_time": "2017-06-19T08:52:46Z",
        "last_change_time": "2022-10-11T19:24:38Z",
        "summary": "Add-on icons should be in the navbar by first paint"
      },
      {
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1388538,
        "last_change_time": "2024-12-06T16:27:49Z",
        "summary": "Add ICs for slotful own-prop Xray property access (property on the expando)",
        "creation_time": "2017-08-08T21:56:17Z",
        "priority": "P3",
        "component": "JavaScript Engine",
        "keywords": []
      },
      {
        "op_sys": "macOS",
        "id": 1400787,
        "creation_time": "2017-09-18T08:13:45Z",
        "last_change_time": "2022-10-11T19:42:53Z",
        "summary": "Using software video decoders (include VP9) ramps up computer fans on Macbook.",
        "severity": "S3",
        "status": "NEW",
        "component": "Audio/Video: Playback",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3"
      },
      {
        "id": 1406622,
        "op_sys": "Unspecified",
        "summary": "stylo: use invalidation framework to handle restyles needed in response to content insertion/removal",
        "creation_time": "2017-10-07T10:11:51Z",
        "last_change_time": "2022-10-11T19:47:36Z",
        "status": "NEW",
        "severity": "S3",
        "component": "CSS Parsing and Computation",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P2"
      },
      {
        "priority": "P3",
        "component": "Tabbed Browser",
        "keywords": [
          "perf",
          "perf:frontend"
        ],
        "status": "NEW",
        "severity": "S3",
        "id": 1425887,
        "op_sys": "All",
        "last_change_time": "2025-11-24T20:54:46Z",
        "creation_time": "2017-12-18T17:47:35Z",
        "summary": "With tab animations disabled, closing current tab to switch to another will visibly show a blank page with spinner (causing flashing)"
      },
      {
        "status": "NEW",
        "severity": "S3",
        "summary": "RexBench is slower than Chrome/WebKit",
        "last_change_time": "2025-06-11T11:06:28Z",
        "creation_time": "2018-01-09T05:47:13Z",
        "id": 1428972,
        "op_sys": "Unspecified",
        "priority": "P2",
        "keywords": [
          "perf"
        ],
        "component": "JavaScript Engine"
      },
      {
        "status": "NEW",
        "severity": "S3",
        "id": 1439892,
        "op_sys": "Unspecified",
        "last_change_time": "2024-04-03T03:06:41Z",
        "summary": "Activity stream initialization causes jank after receiving the sessionstore-windows-restored notification",
        "creation_time": "2018-02-21T13:15:04Z",
        "priority": "P3",
        "component": "New Tab Page",
        "keywords": [
          "perf:frontend",
          "perf:startup"
        ]
      },
      {
        "status": "NEW",
        "severity": "S3",
        "last_change_time": "2022-10-11T21:21:11Z",
        "summary": "Try to understand why we're slower than Chrome on StyleBench \"Positional pseudo classes : Adding leaf elements: Async\" (& similar \"Removing\" measurement)",
        "creation_time": "2018-03-05T04:29:30Z",
        "id": 1443066,
        "op_sys": "Unspecified",
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "component": "CSS Parsing and Computation"
      },
      {
        "priority": "P3",
        "component": "Application Update",
        "keywords": [
          "perf:startup"
        ],
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1446012,
        "creation_time": "2018-03-15T16:29:05Z",
        "summary": "The first startup after an update does main thread I/O to update.status several times",
        "last_change_time": "2022-10-11T21:23:37Z"
      },
      {
        "priority": "P5",
        "component": "JavaScript Engine: JIT",
        "keywords": [
          "perf"
        ],
        "severity": "N/A",
        "status": "NEW",
        "op_sys": "All",
        "id": 1454586,
        "last_change_time": "2025-04-23T10:03:41Z",
        "summary": "Optimize resume point creation in IonBuilder",
        "creation_time": "2018-04-17T08:42:34Z"
      },
      {
        "component": "Networking: JAR",
        "keywords": [
          "perf",
          "perf:responsiveness",
          "perf:startup"
        ],
        "priority": "P3",
        "op_sys": "Unspecified",
        "id": 1456626,
        "summary": "nsJARChannel::asyncOpen can still block",
        "creation_time": "2018-04-24T20:33:58Z",
        "last_change_time": "2025-04-15T20:34:51Z",
        "severity": "S3",
        "status": "NEW"
      },
      {
        "priority": "P3",
        "keywords": [
          "nightly-community",
          "perf",
          "perf:responsiveness",
          "regression"
        ],
        "component": "Web Painting",
        "status": "NEW",
        "severity": "S3",
        "last_change_time": "2025-03-11T07:19:40Z",
        "summary": "Checkerboarding while scrollbar-dragging due to slow display list build on specific page with table layout",
        "creation_time": "2018-04-24T21:08:43Z",
        "id": 1456638,
        "op_sys": "Windows 7"
      },
      {
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "component": "Layout: Block and Inline",
        "status": "NEW",
        "severity": "S3",
        "summary": "It takes a long time to re-layout the plaintext page when the sidebar is opening or closing until  move the mouse in the content area (with long time spent in RFindLineContaining)",
        "creation_time": "2018-04-25T19:10:14Z",
        "last_change_time": "2024-02-08T23:49:09Z",
        "id": 1456964,
        "op_sys": "Windows 10"
      },
      {
        "severity": "S3",
        "status": "NEW",
        "creation_time": "2018-04-26T19:55:49Z",
        "summary": "TabChild::RecvRenderLayers often results in two consecutive paints",
        "last_change_time": "2023-09-21T15:50:42Z",
        "op_sys": "Unspecified",
        "id": 1457276,
        "priority": "P2",
        "keywords": [
          "perf:resource-use"
        ],
        "component": "DOM: Content Processes"
      },
      {
        "severity": "S3",
        "status": "NEW",
        "summary": "\"forget about this site\" in \"show all history\" blocks the main thread",
        "last_change_time": "2023-05-22T15:45:39Z",
        "creation_time": "2018-05-02T18:01:37Z",
        "op_sys": "Unspecified",
        "id": 1458634,
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:resource-use",
          "perf:responsiveness"
        ],
        "component": "Bookmarks & History"
      },
      {
        "severity": "S3",
        "status": "NEW",
        "last_change_time": "2022-10-11T21:41:13Z",
        "summary": "High variability in performance testing with large images",
        "creation_time": "2018-06-11T20:32:18Z",
        "op_sys": "Unspecified",
        "id": 1468246,
        "priority": "P3",
        "keywords": [
          "perf:pageload"
        ],
        "component": "Layout"
      },
      {
        "status": "NEW",
        "severity": "S3",
        "id": 1471029,
        "op_sys": "All",
        "creation_time": "2018-06-25T21:14:25Z",
        "last_change_time": "2022-10-11T21:43:40Z",
        "summary": "High cpu/gpu usage and hangs on page-http://telegra.ph/Telegram-X-03-26 & other pages",
        "priority": "P3",
        "component": "Audio/Video: Playback",
        "keywords": [
          "hang",
          "perf:resource-use",
          "power"
        ]
      },
      {
        "priority": "P2",
        "keywords": [
          "perf:responsiveness",
          "perf:startup"
        ],
        "component": "Security: Process Sandboxing",
        "severity": "S3",
        "status": "NEW",
        "creation_time": "2018-07-16T20:44:07Z",
        "last_change_time": "2022-10-11T21:47:20Z",
        "summary": "Optimize Windows sandbox policy construction",
        "op_sys": "Windows",
        "id": 1476101
      },
      {
        "status": "NEW",
        "severity": "S3",
        "last_change_time": "2022-10-11T21:49:50Z",
        "creation_time": "2018-07-27T10:44:44Z",
        "summary": "style.foo = bar changes are slow",
        "id": 1478953,
        "op_sys": "Unspecified",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "component": "CSS Parsing and Computation"
      },
      {
        "priority": "P3",
        "component": "Audio/Video: Playback",
        "keywords": [
          "perf:resource-use"
        ],
        "status": "NEW",
        "severity": "S3",
        "id": 1481967,
        "op_sys": "All",
        "summary": "100% cpu usage and high memory use on page with multiple embedded videos",
        "creation_time": "2018-08-08T22:40:31Z",
        "last_change_time": "2025-03-06T17:21:40Z"
      },
      {
        "priority": "P3",
        "component": "JavaScript Engine: JIT",
        "keywords": [],
        "status": "NEW",
        "severity": "S3",
        "id": 1483345,
        "op_sys": "Unspecified",
        "creation_time": "2018-08-14T19:58:58Z",
        "last_change_time": "2024-09-21T13:28:21Z",
        "summary": "Try and re-attach NewObject stubs after GC"
      },
      {
        "priority": "P3",
        "component": "JavaScript Engine",
        "keywords": [],
        "severity": "S3",
        "status": "NEW",
        "op_sys": "macOS",
        "id": 1488435,
        "creation_time": "2018-09-04T14:10:08Z",
        "summary": "Significant key input delay when typing on large Google Docs",
        "last_change_time": "2025-01-29T17:31:27Z"
      },
      {
        "priority": "P5",
        "component": "JavaScript Engine: JIT",
        "keywords": [
          "meta"
        ],
        "status": "NEW",
        "severity": "N/A",
        "id": 1490847,
        "op_sys": "Unspecified",
        "last_change_time": "2025-04-23T10:05:12Z",
        "summary": "[meta] Long-standing Ion Compilation Time Issues",
        "creation_time": "2018-09-12T22:40:00Z"
      },
      {
        "severity": "N/A",
        "status": "NEW",
        "last_change_time": "2025-11-20T08:28:19Z",
        "creation_time": "2018-09-12T22:46:57Z",
        "summary": "Off-Main-Thread Baseline Compilation",
        "op_sys": "Unspecified",
        "id": 1490849,
        "priority": "P2",
        "keywords": [],
        "component": "JavaScript Engine: JIT"
      },
      {
        "priority": "P3",
        "component": "Audio/Video: Playback",
        "keywords": [
          "perf:resource-use"
        ],
        "status": "NEW",
        "severity": "S3",
        "id": 1496096,
        "op_sys": "Unspecified",
        "summary": "Horrible performance on runningworld due to media decoding",
        "last_change_time": "2025-03-06T17:21:31Z",
        "creation_time": "2018-10-03T15:02:45Z"
      },
      {
        "component": "JavaScript Engine",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P3",
        "id": 1498485,
        "op_sys": "Android",
        "summary": "hubs.mozilla.com frame rate with an empty scene is too slow in FxR on Oculus Go",
        "creation_time": "2018-10-12T07:38:21Z",
        "last_change_time": "2024-05-03T15:18:39Z",
        "status": "NEW",
        "severity": "S3"
      },
      {
        "id": 1502334,
        "op_sys": "All",
        "summary": "Reddit content is no longer displayed when scrolled (checkerboarding), with long restyles",
        "creation_time": "2018-10-26T12:54:03Z",
        "last_change_time": "2025-03-11T08:54:07Z",
        "status": "NEW",
        "severity": "S3",
        "component": "CSS Parsing and Computation",
        "keywords": [
          "perf:animation",
          "regression",
          "reproducible",
          "top50"
        ],
        "priority": "--"
      },
      {
        "keywords": [
          "perf:pageload"
        ],
        "component": "JavaScript Engine",
        "priority": "P2",
        "summary": "twitch.tv site loads slow compared to Chrome",
        "creation_time": "2018-11-06T22:12:10Z",
        "last_change_time": "2022-10-11T22:10:59Z",
        "op_sys": "Android",
        "id": 1505192,
        "severity": "S3",
        "status": "NEW"
      },
      {
        "status": "NEW",
        "severity": "S3",
        "last_change_time": "2025-03-06T17:04:43Z",
        "creation_time": "2018-11-07T17:49:31Z",
        "summary": "Getting a list of audio devices on about:support is super slow sometimes",
        "id": 1505483,
        "op_sys": "Unspecified",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "component": "Audio/Video"
      },
      {
        "priority": "P5",
        "keywords": [
          "main-thread-io",
          "perf:responsiveness"
        ],
        "component": "Graphics",
        "status": "NEW",
        "severity": "S3",
        "creation_time": "2018-11-07T19:32:59Z",
        "summary": "graphics data gathering (and/or canvas webgl context initialization) from about:support is slow",
        "last_change_time": "2024-03-20T20:46:07Z",
        "id": 1505533,
        "op_sys": "Unspecified"
      },
      {
        "component": "DOM: Animation",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P3",
        "id": 1506765,
        "op_sys": "Unspecified",
        "creation_time": "2018-11-13T04:54:48Z",
        "last_change_time": "2022-10-11T22:12:27Z",
        "summary": "Do an optimization to not flush animations which are running on the compositor in various places where we call FlushPendingNotification",
        "status": "NEW",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "status": "NEW",
        "creation_time": "2018-11-13T21:07:29Z",
        "summary": "Try persisting chromemargin and brighttext attributes on browser windows",
        "last_change_time": "2022-10-11T22:12:38Z",
        "op_sys": "Unspecified",
        "id": 1506962,
        "priority": "P5",
        "keywords": [
          "perf:frontend",
          "perf:responsiveness",
          "perf:startup"
        ],
        "component": "Tabbed Browser"
      },
      {
        "status": "NEW",
        "severity": "S3",
        "summary": "Firefox is very slow to render poster PDF",
        "last_change_time": "2023-07-24T12:22:05Z",
        "creation_time": "2018-11-20T19:36:06Z",
        "id": 1508765,
        "op_sys": "Unspecified",
        "priority": "P3",
        "keywords": [
          "parity-chrome",
          "perf",
          "perf:animation",
          "perf:pageload",
          "perf:responsiveness",
          "regression",
          "reproducible"
        ],
        "component": "PDF Viewer"
      },
      {
        "id": 1509228,
        "op_sys": "Unspecified",
        "creation_time": "2018-11-22T04:38:51Z",
        "last_change_time": "2022-10-11T22:14:24Z",
        "summary": "Optimizing nsGlobalWindowOuter::NotifyContentBlockingState() seems to have an impact on pageload",
        "status": "NEW",
        "severity": "S3",
        "component": "DOM: Core & HTML",
        "keywords": [
          "perf",
          "perf:pageload"
        ],
        "priority": "P3"
      },
      {
        "severity": "S3",
        "status": "NEW",
        "creation_time": "2018-12-19T19:35:51Z",
        "last_change_time": "2022-10-11T22:19:55Z",
        "summary": "Defer GCs in background tabs/processes during pageload",
        "op_sys": "Unspecified",
        "id": 1515414,
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:pageload"
        ],
        "component": "JavaScript: GC"
      },
      {
        "component": "Graphics",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "op_sys": "Unspecified",
        "id": 1515473,
        "creation_time": "2018-12-19T22:43:20Z",
        "last_change_time": "2024-08-03T20:54:28Z",
        "summary": "CPU intensive slideshow on http://thesantaclausparade.com/",
        "severity": "S3",
        "status": "NEW"
      },
      {
        "priority": "P3",
        "keywords": [
          "meta",
          "perf:frontend",
          "perf:startup"
        ],
        "component": "General",
        "status": "NEW",
        "severity": "S3",
        "last_change_time": "2023-08-05T01:39:19Z",
        "creation_time": "2018-12-20T23:13:35Z",
        "summary": "[meta] reduce impact/overhead of custom element use on startup",
        "id": 1515799,
        "op_sys": "Unspecified"
      },
      {
        "priority": "P5",
        "component": "Downloads Panel",
        "keywords": [
          "perf:frontend",
          "perf:startup"
        ],
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1516525,
        "summary": "Download indicator code should use idle task and/or not load until there are downloads",
        "last_change_time": "2022-10-11T22:20:48Z",
        "creation_time": "2018-12-27T14:05:19Z"
      },
      {
        "priority": "P2",
        "keywords": [
          "perf:responsiveness"
        ],
        "component": "Layout",
        "status": "NEW",
        "severity": "S3",
        "last_change_time": "2022-10-11T22:24:11Z",
        "summary": "jetbrains \"upsource\" file-view hangs the browser, when scrolled",
        "creation_time": "2019-01-17T08:50:51Z",
        "id": 1520729,
        "op_sys": "Unspecified"
      },
      {
        "status": "NEW",
        "severity": "S3",
        "last_change_time": "2022-10-11T22:25:37Z",
        "summary": "InitOtherFamilyNamesRunnable can slow down first page load and take > 100ms",
        "creation_time": "2019-01-23T18:40:07Z",
        "id": 1522196,
        "op_sys": "All",
        "priority": "P2",
        "keywords": [
          "perf:pageload"
        ],
        "component": "Layout: Text and Fonts"
      },
      {
        "severity": "S3",
        "status": "NEW",
        "last_change_time": "2025-03-02T13:58:32Z",
        "creation_time": "2019-01-26T00:23:18Z",
        "summary": "[meta] Performance of \"about:config\"",
        "op_sys": "All",
        "id": 1523028,
        "priority": "P3",
        "keywords": [
          "meta",
          "perf",
          "perf:responsiveness",
          "regression"
        ],
        "component": "Preferences"
      },
      {
        "priority": "P3",
        "component": "Audio/Video: Playback",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW",
        "severity": "S3",
        "id": 1524384,
        "op_sys": "macOS",
        "last_change_time": "2025-03-17T17:28:58Z",
        "creation_time": "2019-01-31T20:58:54Z",
        "summary": "Twitch.tv video's (vod) freeze during playback on MacOS"
      },
      {
        "id": 1527037,
        "op_sys": "Unspecified",
        "last_change_time": "2022-10-11T22:29:04Z",
        "summary": "Scroll jank when mousewheel-scrolling slide thumbnails on Google Docs (with lots of time spent painting & in GetFrameForPoint)",
        "creation_time": "2019-02-11T18:16:31Z",
        "status": "NEW",
        "severity": "S3",
        "component": "Web Painting",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P2"
      },
      {
        "priority": "P2",
        "keywords": [
          "meta",
          "perf:pageload"
        ],
        "component": "Networking: HTTP",
        "severity": "S3",
        "status": "NEW",
        "creation_time": "2019-02-15T16:08:16Z",
        "summary": "[meta] Allow call of AsyncOpen and OnStart/OnStopRequest off the main thread",
        "last_change_time": "2025-11-21T13:11:58Z",
        "op_sys": "Unspecified",
        "id": 1528285
      },
      {
        "op_sys": "Unspecified",
        "id": 1534371,
        "summary": "Lazy load browser.xul menus",
        "last_change_time": "2023-08-05T01:38:55Z",
        "creation_time": "2019-03-11T18:25:07Z",
        "severity": "S3",
        "status": "NEW",
        "component": "Menus",
        "keywords": [
          "perf:frontend",
          "perf:startup"
        ],
        "priority": "P3"
      },
      {
        "severity": "S3",
        "status": "NEW",
        "op_sys": "macOS",
        "id": 1536622,
        "last_change_time": "2023-02-01T17:22:05Z",
        "creation_time": "2019-03-19T21:20:53Z",
        "summary": "[10.14.4] Poor battery life on MacBook Pro",
        "priority": "P3",
        "component": "Graphics",
        "keywords": [
          "perf",
          "perf:resource-use"
        ]
      },
      {
        "severity": "S3",
        "status": "NEW",
        "creation_time": "2019-03-20T07:53:47Z",
        "last_change_time": "2024-04-02T13:41:19Z",
        "summary": "Performance is slow/janky with a full complement of add-ons, restored session, opening discarded tabs",
        "op_sys": "Unspecified",
        "id": 1536739,
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "component": "General"
      },
      {
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1538784,
        "creation_time": "2019-03-25T17:26:55Z",
        "last_change_time": "2025-03-20T13:08:13Z",
        "summary": "Set nsThreadPool limits more intelligently",
        "priority": "--",
        "component": "XPCOM",
        "keywords": [
          "perf:resource-use"
        ]
      },
      {
        "keywords": [
          "perf:responsiveness"
        ],
        "component": "Graphics",
        "priority": "P3",
        "last_change_time": "2022-10-11T22:39:22Z",
        "summary": "Running gfxPlatform::Init in the content process can take a long time",
        "creation_time": "2019-03-26T20:57:57Z",
        "op_sys": "Unspecified",
        "id": 1539266,
        "severity": "S3",
        "status": "NEW"
      },
      {
        "keywords": [
          "perf:responsiveness"
        ],
        "component": "Graphics",
        "priority": "P2",
        "last_change_time": "2022-10-11T22:40:24Z",
        "summary": "Brief video and audio interruptions on YouTube when tab is focused after it was in the background",
        "creation_time": "2019-03-29T19:18:26Z",
        "op_sys": "Unspecified",
        "id": 1540226,
        "severity": "S3",
        "status": "NEW"
      },
      {
        "keywords": [
          "main-thread-io",
          "perf:startup"
        ],
        "component": "Crash Reporting",
        "priority": "P2",
        "creation_time": "2019-04-02T20:18:11Z",
        "summary": "Avoid nsExceptionHandler::SetupExtraData() doing main thread IO super early on startup",
        "last_change_time": "2025-08-26T15:54:44Z",
        "id": 1541200,
        "op_sys": "Unspecified",
        "status": "NEW",
        "severity": "S3"
      },
      {
        "priority": "P3",
        "component": "Startup and Profile System",
        "keywords": [
          "main-thread-io",
          "perf",
          "perf:startup"
        ],
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1541491,
        "summary": "Evaluate whether we can stop using compatibility.ini in the common case where app compat info is in profiles.ini / installs.ini",
        "creation_time": "2019-04-03T17:10:18Z",
        "last_change_time": "2024-07-25T20:36:55Z"
      },
      {
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1541494,
        "last_change_time": "2022-10-11T22:41:40Z",
        "summary": "Stop writing compatibility.ini piecemeal and on the main thread and on startup",
        "creation_time": "2019-04-03T17:15:49Z",
        "priority": "P3",
        "component": "Startup and Profile System",
        "keywords": [
          "main-thread-io",
          "perf",
          "perf:responsiveness",
          "perf:startup"
        ]
      },
      {
        "status": "NEW",
        "severity": "S3",
        "id": 1541601,
        "op_sys": "Unspecified",
        "creation_time": "2019-04-03T21:31:57Z",
        "summary": "Very very very carefully... remove channel-prefs.js and stop reading it from the main thread early on startup",
        "last_change_time": "2025-09-30T14:55:10Z",
        "priority": "--",
        "component": "Startup and Profile System",
        "keywords": [
          "main-thread-io",
          "perf",
          "perf:startup"
        ]
      },
      {
        "priority": "P2",
        "component": "Performance: Navigation",
        "keywords": [
          "meta",
          "perf:pageload"
        ],
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1543776,
        "creation_time": "2019-04-11T17:55:48Z",
        "summary": "[meta] 5+ second delays seen while loading www.allrecipes.com on geckoview_example",
        "last_change_time": "2025-03-21T02:42:28Z"
      },
      {
        "priority": "--",
        "component": "XPCOM",
        "keywords": [
          "main-thread-io",
          "perf",
          "perf:startup"
        ],
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1544019,
        "summary": "Consolidate IO for startupCache folder access",
        "last_change_time": "2023-05-31T19:21:00Z",
        "creation_time": "2019-04-12T14:40:08Z"
      },
      {
        "priority": "P3",
        "keywords": [
          "main-thread-io",
          "perf",
          "perf:responsiveness",
          "perf:startup"
        ],
        "component": "Startup and Profile System",
        "severity": "S3",
        "status": "NEW",
        "last_change_time": "2022-10-11T22:44:28Z",
        "creation_time": "2019-04-15T18:19:33Z",
        "summary": "Investigate compressing omni.ja's (with lz4)",
        "op_sys": "Unspecified",
        "id": 1544504
      },
      {
        "summary": "Update service tries to migrate things from \"old update dir\" early on startup and does main thread IO",
        "last_change_time": "2023-06-26T23:49:36Z",
        "creation_time": "2019-04-17T15:06:25Z",
        "id": 1545119,
        "op_sys": "Unspecified",
        "status": "NEW",
        "severity": "S3",
        "keywords": [
          "main-thread-io",
          "perf:startup"
        ],
        "component": "Application Update",
        "priority": "P5"
      },
      {
        "id": 1548033,
        "op_sys": "Unspecified",
        "summary": "Only prefetch the parts of XUL.dll  that we actually will need",
        "last_change_time": "2022-10-11T22:47:35Z",
        "creation_time": "2019-04-30T16:38:33Z",
        "status": "NEW",
        "severity": "S3",
        "component": "Startup and Profile System",
        "keywords": [
          "main-thread-io",
          "perf",
          "perf:startup"
        ],
        "priority": "P3"
      },
      {
        "last_change_time": "2025-03-03T21:20:28Z",
        "summary": "Stopping blocking bfcache on unconnected peerconnections",
        "creation_time": "2019-05-02T14:17:10Z",
        "op_sys": "Unspecified",
        "id": 1548539,
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf:pageload"
        ],
        "component": "WebRTC",
        "priority": "P3"
      },
      {
        "id": 1553536,
        "op_sys": "Unspecified",
        "summary": "Use minidump-analyzer to append Windows AV/spyware/firewall data to crashreport .extra file; add to telemetry environment data lazily",
        "last_change_time": "2025-04-16T14:45:56Z",
        "creation_time": "2019-05-22T16:11:19Z",
        "status": "NEW",
        "severity": "S3",
        "component": "Crash Reporting",
        "keywords": [
          "main-thread-io",
          "perf",
          "perf:startup"
        ],
        "priority": "--"
      },
      {
        "priority": "P3",
        "keywords": [
          "perf:resource-use"
        ],
        "component": "New Tab Page",
        "severity": "S3",
        "status": "NEW",
        "creation_time": "2019-05-23T21:51:13Z",
        "summary": "Defer initial processing by Privileged Content process at startup",
        "last_change_time": "2025-08-22T15:44:10Z",
        "op_sys": "Unspecified",
        "id": 1553980
      },
      {
        "priority": "--",
        "keywords": [
          "main-thread-io",
          "perf:resource-use",
          "perf:startup"
        ],
        "component": "XPCOM",
        "severity": "S3",
        "status": "NEW",
        "last_change_time": "2023-02-22T18:35:16Z",
        "summary": "nsLocalFile's Clone method is too naive, should reuse more information from the original",
        "creation_time": "2019-05-24T15:01:19Z",
        "op_sys": "Unspecified",
        "id": 1554200
      },
      {
        "keywords": [
          "perf:pageload",
          "perf:responsiveness"
        ],
        "component": "Safe Browsing",
        "priority": "P3",
        "last_change_time": "2025-02-12T03:06:45Z",
        "summary": "Classifier Update should wait for an user-idle period before initiating an update",
        "creation_time": "2019-05-24T20:22:15Z",
        "op_sys": "Unspecified",
        "id": 1554313,
        "severity": "S3",
        "status": "NEW"
      },
      {
        "severity": "S3",
        "status": "NEW",
        "summary": "Investigate linking softokn/freebl/nss thingies directly into libxul or use readahead to make actual nss initialization cheaper",
        "last_change_time": "2025-12-16T16:09:55Z",
        "creation_time": "2019-06-06T15:49:16Z",
        "op_sys": "Unspecified",
        "id": 1557378,
        "priority": "P3",
        "keywords": [
          "main-thread-io",
          "perf",
          "perf:startup"
        ],
        "component": "Security: PSM"
      },
      {
        "status": "NEW",
        "severity": "S3",
        "summary": "When defaulting to showing about:home on startup, try to delay WebExtension process start-up until after about:home is done loading",
        "creation_time": "2019-07-16T15:55:54Z",
        "last_change_time": "2024-04-03T16:04:02Z",
        "id": 1566487,
        "op_sys": "All",
        "priority": "P3",
        "keywords": [
          "perf:resource-use",
          "perf:startup"
        ],
        "component": "General"
      },
      {
        "keywords": [
          "perf:responsiveness"
        ],
        "component": "Graphics: WebRender",
        "priority": "P3",
        "last_change_time": "2024-09-20T22:54:50Z",
        "summary": "WebRender performs worse on Binding of Isaac CodePen demo (svg filters/blob)",
        "creation_time": "2019-07-22T20:30:43Z",
        "op_sys": "Unspecified",
        "id": 1568027,
        "severity": "S3",
        "status": "NEW"
      },
      {
        "priority": "P2",
        "component": "Performance: Navigation",
        "keywords": [
          "perf:pageload"
        ],
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1570090,
        "creation_time": "2019-07-30T18:44:15Z",
        "summary": "Investigate fast first paints",
        "last_change_time": "2025-03-21T02:42:54Z"
      },
      {
        "severity": "S3",
        "status": "NEW",
        "creation_time": "2019-08-01T11:28:18Z",
        "last_change_time": "2024-04-30T00:02:56Z",
        "summary": "[meta] Move away from sync CoCreateInstance to RoGetAgileReference or similar (to avoid mainthread IO)",
        "op_sys": "Windows",
        "id": 1570616,
        "priority": "P3",
        "keywords": [
          "main-thread-io",
          "meta",
          "perf:responsiveness",
          "perf:startup"
        ],
        "component": "Widget: Win32"
      },
      {
        "keywords": [
          "perf:pageload"
        ],
        "component": "Layout: Text and Fonts",
        "priority": "P3",
        "summary": "gfxFontGroup::FindFontForChar took a lot of time during reflow",
        "creation_time": "2019-08-01T19:38:04Z",
        "last_change_time": "2025-06-12T19:54:27Z",
        "id": 1570750,
        "op_sys": "Unspecified",
        "status": "NEW",
        "severity": "S3"
      },
      {
        "status": "NEW",
        "severity": "S3",
        "id": 1572180,
        "op_sys": "Unspecified",
        "creation_time": "2019-08-07T18:46:11Z",
        "summary": "68 runs 3x slower than 67 on sample script",
        "last_change_time": "2022-10-11T23:10:26Z",
        "priority": "P2",
        "component": "Performance: General",
        "keywords": [
          "perf:resource-use"
        ]
      },
      {
        "id": 1582525,
        "op_sys": "Unspecified",
        "last_change_time": "2022-03-02T16:34:12Z",
        "creation_time": "2019-09-19T18:12:52Z",
        "summary": "Avoid racing 6 connections for sites known to have been HTTP2 in the past",
        "status": "NEW",
        "severity": "N/A",
        "component": "Networking",
        "keywords": [
          "perf:pageload"
        ],
        "priority": "P5"
      },
      {
        "creation_time": "2019-09-23T14:36:55Z",
        "last_change_time": "2025-11-07T07:18:14Z",
        "summary": "Visual metrics: Fenix is significantly slower than Chrome for the site https://cnn.com",
        "id": 1583220,
        "op_sys": "Android",
        "status": "NEW",
        "severity": "S3",
        "keywords": [
          "perf:pageload",
          "perf:responsiveness",
          "reproducible",
          "top50"
        ],
        "component": "Performance: Responsiveness",
        "priority": "P2"
      },
      {
        "component": "Performance: Responsiveness",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P2",
        "op_sys": "Unspecified",
        "id": 1585327,
        "summary": "Add normal-priority event queue delay time to Responsiveness measurements",
        "creation_time": "2019-10-01T13:25:15Z",
        "last_change_time": "2025-03-21T01:05:02Z",
        "severity": "S3",
        "status": "NEW"
      },
      {
        "priority": "P3",
        "component": "Bookmarks & History",
        "keywords": [
          "perf:frontend"
        ],
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1597684,
        "summary": "Bookmarks & History: extremely slow back/forward navigation",
        "creation_time": "2019-11-19T14:50:13Z",
        "last_change_time": "2023-08-05T01:41:54Z"
      },
      {
        "keywords": [
          "perf:pageload"
        ],
        "component": "JavaScript Engine",
        "priority": "P3",
        "last_change_time": "2025-12-01T21:24:05Z",
        "summary": "13 seconds of jank when loading https://data.firefox.com/dashboard/hardware",
        "creation_time": "2019-11-21T18:08:03Z",
        "op_sys": "Unspecified",
        "id": 1598384,
        "severity": "S3",
        "status": "NEW"
      },
      {
        "component": "DOM: Navigation",
        "keywords": [
          "perf:pageload",
          "reproducible"
        ],
        "priority": "P3",
        "op_sys": "Unspecified",
        "id": 1603578,
        "summary": "Implement caching of retired web-isolated processes for reuse in the same domain in Fission",
        "creation_time": "2019-12-12T21:17:30Z",
        "last_change_time": "2024-10-14T08:20:50Z",
        "severity": "S3",
        "status": "NEW"
      },
      {
        "keywords": [
          "perf:responsiveness"
        ],
        "component": "Audio/Video: GMP",
        "priority": "P3",
        "summary": "GMP thread can write to disk (to clear storage or remove plugins) at xpcom-shutdown-threads time",
        "last_change_time": "2022-10-11T23:50:49Z",
        "creation_time": "2020-01-15T15:49:54Z",
        "id": 1609444,
        "op_sys": "Unspecified",
        "status": "NEW",
        "severity": "S3"
      },
      {
        "priority": "P2",
        "keywords": [
          "perf:resource-use"
        ],
        "component": "Performance: General",
        "severity": "S3",
        "status": "NEW",
        "summary": "[fission-power] Synchronize periodic background tasks (such as expiration tracker ticks) across content processes",
        "creation_time": "2020-02-06T20:58:06Z",
        "last_change_time": "2024-06-28T12:13:45Z",
        "op_sys": "All",
        "id": 1613760
      },
      {
        "creation_time": "2020-02-07T04:18:58Z",
        "last_change_time": "2025-03-21T02:41:36Z",
        "summary": "Apple Newsroom page takes a long time to load (30 seconds)",
        "op_sys": "Android",
        "id": 1613824,
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf:pageload"
        ],
        "component": "Performance: Navigation",
        "priority": "P2"
      },
      {
        "component": "General",
        "keywords": [
          "meta",
          "perf:responsiveness",
          "sec-want"
        ],
        "priority": "P3",
        "op_sys": "All",
        "id": 1614096,
        "last_change_time": "2025-10-28T10:43:51Z",
        "summary": "[meta] Move all devtools UI out of the parent process into a privileged content process",
        "creation_time": "2020-02-08T01:20:13Z",
        "severity": "S3",
        "status": "NEW"
      },
      {
        "priority": "P2",
        "keywords": [
          "perf:pageload"
        ],
        "component": "Performance: Navigation",
        "severity": "S3",
        "status": "NEW",
        "creation_time": "2020-02-10T18:50:35Z",
        "last_change_time": "2025-09-15T08:00:19Z",
        "summary": "https://www.fido.ca/ Pages load on mobile is several seconds slower than chrome",
        "op_sys": "Android",
        "id": 1614425
      },
      {
        "component": "General",
        "keywords": [
          "perf:frontend",
          "perf:startup"
        ],
        "priority": "--",
        "op_sys": "Linux",
        "id": 1618129,
        "creation_time": "2020-02-26T10:02:21Z",
        "last_change_time": "2022-10-12T00:00:07Z",
        "summary": "Very slow session restore (profile included)",
        "severity": "S3",
        "status": "NEW"
      },
      {
        "keywords": [
          "perf:responsiveness"
        ],
        "component": "Performance: Responsiveness",
        "priority": "P3",
        "summary": "Slow performance when scrolling Firefox subreddit top posts of the week",
        "creation_time": "2020-03-16T05:56:39Z",
        "last_change_time": "2025-11-07T07:19:12Z",
        "op_sys": "Windows 10",
        "id": 1622721,
        "severity": "S3",
        "status": "NEW"
      },
      {
        "priority": "P3",
        "component": "Graphics",
        "keywords": [
          "main-thread-io",
          "perf",
          "perf:startup"
        ],
        "status": "NEW",
        "severity": "S3",
        "id": 1625320,
        "op_sys": "Unspecified",
        "summary": "gfxDWriteFontEntry::IsCJKFont() causes main thread I/O to times.ttf while reflowing the hidden window during startup",
        "creation_time": "2020-03-26T22:16:00Z",
        "last_change_time": "2022-10-12T00:05:51Z"
      },
      {
        "op_sys": "Unspecified",
        "id": 1630999,
        "last_change_time": "2022-03-08T18:34:18Z",
        "creation_time": "2020-04-17T15:40:19Z",
        "summary": "webRequest overhead for data: urls from about:newtab",
        "severity": "S4",
        "status": "NEW",
        "component": "New Tab Page",
        "keywords": [
          "perf:frontend",
          "perf:startup"
        ],
        "priority": "P3"
      },
      {
        "priority": "P3",
        "component": "General",
        "keywords": [
          "perf:startup"
        ],
        "severity": "--",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1631927,
        "summary": "Investigate merging small files loaded during startup into one file",
        "creation_time": "2020-04-21T20:25:52Z",
        "last_change_time": "2022-03-09T16:28:55Z"
      },
      {
        "priority": "P3",
        "component": "General",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "status": "NEW",
        "severity": "--",
        "id": 1633566,
        "op_sys": "All",
        "last_change_time": "2022-04-09T13:12:12Z",
        "creation_time": "2020-04-27T20:49:57Z",
        "summary": "Audit BrowserGlue.dispose for things that can likely be skipped at shutdown"
      },
      {
        "severity": "--",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1633921,
        "last_change_time": "2022-03-28T19:21:24Z",
        "creation_time": "2020-04-28T22:29:02Z",
        "summary": "600ms CreateFile on update.test on reference hardware during startup",
        "priority": "P3",
        "component": "Application Update",
        "keywords": [
          "perf:startup"
        ]
      },
      {
        "id": 1633930,
        "op_sys": "Unspecified",
        "last_change_time": "2022-03-09T16:30:24Z",
        "summary": "Defer xulstore persistence until after startup",
        "creation_time": "2020-04-28T23:08:28Z",
        "status": "NEW",
        "severity": "--",
        "component": "Startup and Profile System",
        "keywords": [
          "perf:startup"
        ],
        "priority": "--"
      },
      {
        "component": "Startup and Profile System",
        "keywords": [
          "perf:startup"
        ],
        "priority": "--",
        "id": 1636996,
        "op_sys": "Unspecified",
        "creation_time": "2020-05-11T16:12:58Z",
        "summary": "Defer UntrustedModuleProcessor work until later in startup",
        "last_change_time": "2022-03-28T19:21:51Z",
        "status": "NEW",
        "severity": "--"
      },
      {
        "summary": "Allow extension processes to be preallocated",
        "last_change_time": "2023-11-25T23:47:11Z",
        "creation_time": "2020-05-14T20:22:45Z",
        "id": 1638119,
        "op_sys": "Unspecified",
        "status": "NEW",
        "severity": "S3",
        "keywords": [
          "perf:resource-use"
        ],
        "component": "DOM: Navigation",
        "priority": "P3"
      },
      {
        "severity": "N/A",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1638421,
        "last_change_time": "2022-03-09T16:31:09Z",
        "summary": "Defer mozilla::intl::GetSystemLocales() until later in startup",
        "creation_time": "2020-05-15T18:19:13Z",
        "priority": "P3",
        "component": "Telemetry",
        "keywords": [
          "perf:startup"
        ]
      },
      {
        "status": "NEW",
        "severity": "N/A",
        "id": 1644740,
        "op_sys": "Unspecified",
        "last_change_time": "2024-07-23T03:28:07Z",
        "summary": "Stop painting when the window is occluded on Windows",
        "creation_time": "2020-06-10T13:56:24Z",
        "priority": "--",
        "component": "Graphics",
        "keywords": [
          "perf:resource-use",
          "top50"
        ]
      },
      {
        "severity": "S3",
        "status": "NEW",
        "last_change_time": "2025-03-21T01:05:16Z",
        "creation_time": "2020-06-17T17:48:18Z",
        "summary": "Background tabs stuck loading while CPU is under heavy load",
        "op_sys": "Windows",
        "id": 1646449,
        "priority": "P2",
        "keywords": [
          "perf:responsiveness"
        ],
        "component": "Performance: Responsiveness"
      },
      {
        "summary": "Firefox takes 50% more time than Chrome to load/reload pages on Boardgamegeek",
        "last_change_time": "2025-04-21T16:54:21Z",
        "creation_time": "2020-07-06T04:12:46Z",
        "op_sys": "Unspecified",
        "id": 1650708,
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf:pageload"
        ],
        "component": "Performance: Navigation",
        "priority": "P3"
      },
      {
        "priority": "P3",
        "keywords": [
          "perf:frontend",
          "perf:startup"
        ],
        "component": "General",
        "severity": "N/A",
        "status": "NEW",
        "last_change_time": "2022-03-28T19:22:23Z",
        "summary": "Evaluate what things should move out of _scheduleArbitrarilyLateIdleTasks()",
        "creation_time": "2020-07-07T18:32:36Z",
        "op_sys": "Unspecified",
        "id": 1651161
      },
      {
        "priority": "P3",
        "component": "JavaScript: GC",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW",
        "severity": "S4",
        "id": 1653088,
        "op_sys": "Unspecified",
        "last_change_time": "2024-11-19T15:27:45Z",
        "creation_time": "2020-07-15T20:19:35Z",
        "summary": "Performance issue on voice.google.com - Site can hang from seconds to minutes"
      },
      {
        "id": 1653777,
        "op_sys": "Android",
        "last_change_time": "2025-06-25T23:56:23Z",
        "summary": "WebGL aquarium sample runs at 30 FPS on Google Pixel 2, 60 FPS on WebView/Chromium",
        "creation_time": "2020-07-18T16:39:27Z",
        "status": "NEW",
        "severity": "S3",
        "component": "Graphics: CanvasWebGL",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P2"
      },
      {
        "priority": "P3",
        "component": "Debugger",
        "keywords": [
          "leave-open",
          "perf:responsiveness"
        ],
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1653779,
        "last_change_time": "2025-11-03T12:19:39Z",
        "creation_time": "2020-07-18T17:04:31Z",
        "summary": "Firefox freezes and becomes unusable on react/typescript/eval-source-map project"
      },
      {
        "status": "NEW",
        "severity": "S3",
        "creation_time": "2020-08-01T19:42:35Z",
        "summary": "some games at gamee.com stutter a lot on firefox while it's smooth on chrome",
        "last_change_time": "2022-03-02T16:39:47Z",
        "id": 1656709,
        "op_sys": "Unspecified",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "component": "Graphics: Canvas2D"
      },
      {
        "id": 1657183,
        "op_sys": "Unspecified",
        "summary": "Janking/stuttering while scrolling on imgur (Celeron N4000) (Geminilake)",
        "creation_time": "2020-08-04T18:08:02Z",
        "last_change_time": "2024-07-22T13:08:08Z",
        "status": "NEW",
        "severity": "S3",
        "component": "Graphics",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P3"
      },
      {
        "id": 1659166,
        "op_sys": "Unspecified",
        "creation_time": "2020-08-14T18:12:37Z",
        "summary": "Very long reflows on Wikipedia Barack Obama page",
        "last_change_time": "2023-08-14T15:04:45Z",
        "status": "NEW",
        "severity": "S3",
        "component": "Layout: Columns",
        "keywords": [
          "perf:pageload",
          "regression",
          "regressionwindow-wanted",
          "reproducible",
          "top50"
        ],
        "priority": "--"
      },
      {
        "severity": "S4",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1659359,
        "last_change_time": "2026-01-05T12:18:02Z",
        "creation_time": "2020-08-16T19:42:09Z",
        "summary": "Heavy janking while doing page up/down on while loading a few tabs in the background",
        "priority": "P2",
        "component": "Performance: Responsiveness",
        "keywords": [
          "perf:responsiveness"
        ]
      },
      {
        "priority": "P2",
        "component": "Performance: Responsiveness",
        "keywords": [
          "perf:responsiveness"
        ],
        "severity": "S3",
        "status": "NEW",
        "op_sys": "macOS",
        "id": 1660838,
        "last_change_time": "2025-04-30T12:57:02Z",
        "summary": "LinkedIn - high resource use (aka fans go crazy) on MacOS",
        "creation_time": "2020-08-24T17:30:02Z"
      },
      {
        "op_sys": "Windows 10",
        "id": 1661090,
        "creation_time": "2020-08-25T17:52:00Z",
        "last_change_time": "2022-03-02T16:40:07Z",
        "summary": "browser and content hangs when zooming map at https://mrosd.maps.arcgis.com/apps/webappviewer/index.html",
        "severity": "S3",
        "status": "NEW",
        "component": "Graphics",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "--"
      },
      {
        "component": "Performance: Navigation",
        "keywords": [
          "perf:pageload",
          "reproducible"
        ],
        "priority": "P3",
        "op_sys": "Unspecified",
        "id": 1663768,
        "creation_time": "2020-09-08T20:28:35Z",
        "summary": "9to5google article takes 2x as much time to load as Chrome",
        "last_change_time": "2025-03-21T02:41:27Z",
        "severity": "S3",
        "status": "NEW"
      },
      {
        "priority": "P2",
        "keywords": [
          "perf:pageload",
          "reproducible"
        ],
        "component": "General",
        "status": "NEW",
        "severity": "S3",
        "creation_time": "2020-09-24T22:23:03Z",
        "last_change_time": "2024-04-08T18:09:43Z",
        "summary": "Fenix loads apple.com 2 seconds slower than Chrome",
        "id": 1667246,
        "op_sys": "Unspecified"
      },
      {
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1667807,
        "creation_time": "2020-09-28T15:36:45Z",
        "summary": "Add Telemetry to measure how long JumpLists block the main thread in the wild",
        "last_change_time": "2023-11-25T00:24:02Z",
        "priority": "P3",
        "component": "Widget: Win32",
        "keywords": [
          "perf:responsiveness"
        ]
      },
      {
        "id": 1670193,
        "op_sys": "Unspecified",
        "last_change_time": "2024-07-17T17:29:49Z",
        "creation_time": "2020-10-09T09:09:08Z",
        "summary": "Google Meet high energy impact on macOS 10.15.7",
        "status": "NEW",
        "severity": "S4",
        "component": "Performance: General",
        "keywords": [
          "perf:resource-use",
          "top50"
        ],
        "priority": "P5"
      },
      {
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Windows 10",
        "id": 1671859,
        "last_change_time": "2022-10-25T15:51:21Z",
        "creation_time": "2020-10-19T01:37:21Z",
        "summary": "Not responding notification from Firefox (in titlebar) when switching to a background window",
        "priority": "P3",
        "component": "Graphics",
        "keywords": [
          "perf:responsiveness"
        ]
      },
      {
        "component": "Performance: Responsiveness",
        "keywords": [
          "nightly-community",
          "perf:responsiveness"
        ],
        "priority": "P2",
        "id": 1675628,
        "op_sys": "Unspecified",
        "creation_time": "2020-11-05T22:19:58Z",
        "summary": "Checkerboarding on scrolling wired.com article",
        "last_change_time": "2025-04-24T20:32:00Z",
        "status": "NEW",
        "severity": "S3"
      },
      {
        "keywords": [
          "perf:responsiveness",
          "regression"
        ],
        "component": "Widget: Cocoa",
        "priority": "P3",
        "creation_time": "2020-11-06T10:14:06Z",
        "last_change_time": "2024-02-26T17:47:05Z",
        "summary": "nsCocoaWindow::GetWorkspaceID() hangs in SLSCopySpacesForWindows from SkyLight",
        "op_sys": "Unspecified",
        "id": 1675724,
        "severity": "S3",
        "status": "NEW"
      },
      {
        "summary": "PDF.js in Firefox slower than Chrome to load first page of large presentation",
        "creation_time": "2020-11-17T16:47:34Z",
        "last_change_time": "2022-08-01T12:48:55Z",
        "op_sys": "Unspecified",
        "id": 1677784,
        "severity": "S3",
        "status": "NEW",
        "keywords": [],
        "component": "PDF Viewer",
        "priority": "--"
      },
      {
        "severity": "S3",
        "status": "NEW",
        "creation_time": "2020-12-18T11:42:24Z",
        "last_change_time": "2025-03-11T07:12:59Z",
        "summary": "[meta] High CPU load (40% - 100%) caused by the top extensions loading animation on https://code.visualstudio.com/docs/",
        "op_sys": "All",
        "id": 1683300,
        "priority": "P3",
        "keywords": [
          "meta",
          "perf",
          "perf:resource-use",
          "power"
        ],
        "component": "Graphics: WebRender"
      },
      {
        "keywords": [
          "perf",
          "perf:pageload",
          "reproducible"
        ],
        "component": "Print Preview",
        "priority": "--",
        "summary": "The print preview takes minutes to display for pages that contain images that failed to load",
        "last_change_time": "2024-04-04T23:59:39Z",
        "creation_time": "2021-01-15T16:46:01Z",
        "op_sys": "Unspecified",
        "id": 1686983,
        "severity": "S3",
        "status": "NEW"
      },
      {
        "component": "Performance: General",
        "keywords": [
          "nightly-community"
        ],
        "priority": "P3",
        "id": 1688140,
        "op_sys": "Unspecified",
        "summary": "Slow appearance of article text when scrolling medium.com",
        "last_change_time": "2022-08-31T12:03:46Z",
        "creation_time": "2021-01-22T03:51:18Z",
        "status": "NEW",
        "severity": "S3"
      },
      {
        "priority": "P3",
        "component": "Performance: Responsiveness",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW",
        "severity": "N/A",
        "id": 1688943,
        "op_sys": "All",
        "last_change_time": "2025-03-21T01:05:19Z",
        "summary": "Consider converting timestamps in PerformanceResourceTiming and PerformanceNavigationTiming on creation",
        "creation_time": "2021-01-26T18:47:04Z"
      },
      {
        "status": "NEW",
        "severity": "S3",
        "id": 1688959,
        "op_sys": "Windows",
        "summary": "Main thread hangs in SendFlushRendering if WebRender is busy",
        "creation_time": "2021-01-26T19:38:43Z",
        "last_change_time": "2025-10-22T14:10:57Z",
        "priority": "--",
        "component": "Graphics: WebRender",
        "keywords": []
      },
      {
        "last_change_time": "2026-02-13T14:26:41Z",
        "creation_time": "2021-01-26T19:43:22Z",
        "summary": "WebRender initialization can block the main thread for an appreciable amount of time",
        "op_sys": "All",
        "id": 1688963,
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf:startup"
        ],
        "component": "Graphics: WebRender",
        "priority": "--"
      },
      {
        "severity": "S3",
        "status": "NEW",
        "last_change_time": "2025-03-11T08:48:39Z",
        "creation_time": "2021-01-27T23:52:47Z",
        "summary": "Low FPS Scrolling on Touchpad (Windows 4k)",
        "op_sys": "Unspecified",
        "id": 1689225,
        "priority": "--",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "component": "Graphics: WebRender"
      },
      {
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1692035,
        "last_change_time": "2025-03-21T01:04:21Z",
        "summary": "Opening a new browser window feels slow",
        "creation_time": "2021-02-10T19:58:13Z",
        "priority": "P2",
        "component": "Performance: Responsiveness",
        "keywords": [
          "perf:responsiveness"
        ]
      },
      {
        "keywords": [
          "perf:resource-use"
        ],
        "component": "Performance: General",
        "priority": "P2",
        "summary": "Firefox parent process has very high memory usage and a large number of \"ports\"",
        "creation_time": "2021-02-17T20:14:47Z",
        "last_change_time": "2026-03-06T13:57:44Z",
        "op_sys": "Unspecified",
        "id": 1693382,
        "severity": "S3",
        "status": "NEW"
      },
      {
        "summary": "Slow reflow when selecting a large amount of text, on the logged-out view of GitHub's code viewer",
        "creation_time": "2021-02-23T15:30:09Z",
        "last_change_time": "2025-11-07T07:04:04Z",
        "op_sys": "Unspecified",
        "id": 1694417,
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf:responsiveness"
        ],
        "component": "Layout: Text and Fonts",
        "priority": "--"
      },
      {
        "status": "NEW",
        "severity": "S4",
        "id": 1695273,
        "op_sys": "Unspecified",
        "creation_time": "2021-02-26T17:26:09Z",
        "summary": "[NSFW] Slowness remaining on scrolling nsfw reddit after bug 1694017 is resolved",
        "last_change_time": "2024-09-24T06:10:09Z",
        "priority": "P3",
        "component": "Graphics: WebRender",
        "keywords": [
          "perf:responsiveness",
          "reproducible"
        ]
      },
      {
        "priority": "--",
        "component": "XPCOM",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "severity": "--",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1696051,
        "last_change_time": "2025-03-11T08:41:56Z",
        "creation_time": "2021-03-02T23:05:30Z",
        "summary": "The startup cache file is written to disk during shutdown with many small write calls"
      },
      {
        "keywords": [
          "perf:responsiveness"
        ],
        "component": "JavaScript Engine",
        "priority": "P2",
        "summary": "Scrolling twitter has more checkerboarding than Chrome",
        "creation_time": "2021-03-30T14:59:16Z",
        "last_change_time": "2023-03-09T16:30:19Z",
        "op_sys": "Unspecified",
        "id": 1701956,
        "severity": "S3",
        "status": "NEW"
      },
      {
        "severity": "S3",
        "status": "NEW",
        "summary": "First startup (new profile) can be blocked for a while on mozilla::PermissionManager::EnsureReadCompleted",
        "last_change_time": "2022-04-28T14:17:13Z",
        "creation_time": "2021-03-31T21:37:23Z",
        "op_sys": "Unspecified",
        "id": 1702345,
        "priority": "P3",
        "keywords": [
          "perf:startup"
        ],
        "component": "Permission Manager"
      },
      {
        "severity": "S3",
        "status": "NEW",
        "summary": "More aggressively abort slow scripts when the tab (browser/docshell) goes away",
        "last_change_time": "2022-03-09T19:01:13Z",
        "creation_time": "2021-05-18T18:39:01Z",
        "op_sys": "All",
        "id": 1711758,
        "priority": "P3",
        "keywords": [
          "perf:resource-use",
          "perf:responsiveness"
        ],
        "component": "DOM: Navigation"
      },
      {
        "keywords": [
          "perf:responsiveness"
        ],
        "component": "Cycle Collector",
        "priority": "P2",
        "creation_time": "2021-05-23T19:22:53Z",
        "last_change_time": "2025-04-24T22:38:37Z",
        "summary": "Memory usage skyrockets time to time on crunchyroll.com",
        "id": 1712512,
        "op_sys": "Unspecified",
        "status": "NEW",
        "severity": "S3"
      },
      {
        "priority": "P3",
        "keywords": [
          "perf:pageload"
        ],
        "component": "General",
        "status": "NEW",
        "severity": "N/A",
        "creation_time": "2021-05-25T17:36:26Z",
        "last_change_time": "2023-01-26T23:05:35Z",
        "summary": "Creating GeckoSessions and loading URLs from non-main threads",
        "id": 1712784,
        "op_sys": "All"
      },
      {
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1712882,
        "last_change_time": "2024-08-24T14:14:39Z",
        "creation_time": "2021-05-26T06:32:52Z",
        "summary": "Opening a ticket in JIRA from a kanban board is slow",
        "priority": "P3",
        "component": "JavaScript Engine",
        "keywords": [
          "perf:responsiveness"
        ]
      },
      {
        "last_change_time": "2025-08-20T13:14:22Z",
        "summary": "AddToRecentDocs causes hangs due to main thread I/O",
        "creation_time": "2021-06-04T07:01:34Z",
        "id": 1714504,
        "op_sys": "Unspecified",
        "status": "NEW",
        "severity": "S3",
        "keywords": [
          "hang",
          "main-thread-io",
          "perf",
          "perf:responsiveness",
          "regression"
        ],
        "component": "Downloads API",
        "priority": "P3"
      },
      {
        "status": "NEW",
        "severity": "--",
        "summary": "Opening large data uri based image with \"open image in new tab\" can be very slow",
        "creation_time": "2021-06-12T15:39:00Z",
        "last_change_time": "2024-04-04T02:07:56Z",
        "id": 1716149,
        "op_sys": "All",
        "priority": "--",
        "keywords": [
          "perf",
          "perf:animation",
          "perf:responsiveness",
          "reproducible"
        ],
        "component": "Tabbed Browser"
      },
      {
        "severity": "S3",
        "status": "NEW",
        "last_change_time": "2022-11-24T03:54:12Z",
        "summary": "Big tables jank the browser hard [with dark-background-light-text addon]",
        "creation_time": "2021-06-16T01:13:10Z",
        "op_sys": "Linux",
        "id": 1716686,
        "priority": "--",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "component": "Layout: Tables"
      },
      {
        "last_change_time": "2025-05-08T04:33:03Z",
        "creation_time": "2021-07-13T00:25:13Z",
        "summary": "Certain articles on lanacion.com.ar slow down Firefox a lot, or cause it to become unresponsive if read on inoreader.com (RSS reader)",
        "op_sys": "Unspecified",
        "id": 1720236,
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf:responsiveness"
        ],
        "component": "Performance: Responsiveness",
        "priority": "P2"
      },
      {
        "priority": "--",
        "keywords": [
          "perf:pageload",
          "perf:responsiveness",
          "regression",
          "reproducible"
        ],
        "component": "Layout: Tables",
        "severity": "S3",
        "status": "NEW",
        "creation_time": "2021-08-14T12:19:55Z",
        "summary": "SAP application very slow since 72.0b1, with deeply nested percent-height tables",
        "last_change_time": "2024-03-05T16:23:04Z",
        "op_sys": "Unspecified",
        "id": 1725781
      },
      {
        "component": "Widget: Gtk",
        "keywords": [
          "hang",
          "perf"
        ],
        "priority": "P3",
        "op_sys": "Linux",
        "id": 1727156,
        "last_change_time": "2025-08-22T17:56:56Z",
        "creation_time": "2021-08-23T18:19:30Z",
        "summary": "nsRetrievalContextX11::GetTargets is visible in hang reports",
        "severity": "--",
        "status": "NEW"
      },
      {
        "keywords": [],
        "component": "Performance: General",
        "priority": "P2",
        "creation_time": "2021-08-24T17:44:41Z",
        "summary": "Broken Links in Performance Documentation",
        "last_change_time": "2022-04-29T14:13:49Z",
        "op_sys": "Unspecified",
        "id": 1727380,
        "severity": "--",
        "status": "NEW"
      },
      {
        "creation_time": "2021-09-20T00:00:53Z",
        "summary": "Extreme memory surge when opening a certain pdf-file",
        "last_change_time": "2024-05-02T16:38:31Z",
        "id": 1731514,
        "op_sys": "Unspecified",
        "status": "NEW",
        "severity": "S3",
        "keywords": [
          "perf:pageload",
          "perf:resource-use",
          "regression",
          "reproducible"
        ],
        "component": "PDF Viewer",
        "priority": "P2"
      },
      {
        "keywords": [
          "perf:responsiveness"
        ],
        "component": "Form Autofill",
        "priority": "P3",
        "creation_time": "2021-11-03T17:17:51Z",
        "summary": "300ms jank in _doIdentifyAutofillFields when typing in devtools debugger",
        "last_change_time": "2022-03-02T16:45:55Z",
        "op_sys": "Unspecified",
        "id": 1739170,
        "severity": "S3",
        "status": "NEW"
      },
      {
        "component": "Graphics: WebRender",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "--",
        "op_sys": "Unspecified",
        "id": 1747191,
        "last_change_time": "2022-10-18T12:16:39Z",
        "summary": "https://codepen.io/danwilson/full/VwzNLYd is very slow (mix-blend-mode)",
        "creation_time": "2021-12-22T04:16:58Z",
        "severity": "S3",
        "status": "NEW"
      },
      {
        "creation_time": "2022-01-07T16:07:28Z",
        "summary": "mdns_service thread remains active in the parent process",
        "last_change_time": "2025-03-03T21:36:05Z",
        "id": 1749022,
        "op_sys": "Unspecified",
        "status": "NEW",
        "severity": "S3",
        "keywords": [
          "perf:resource-use",
          "power",
          "reproducible"
        ],
        "component": "WebRTC: Networking",
        "priority": "P3"
      },
      {
        "component": "Graphics: CanvasWebGL",
        "keywords": [],
        "priority": "P3",
        "id": 1753321,
        "op_sys": "Unspecified",
        "summary": "Poor performance on lucidchart.com (with llvmpipe software rendering)",
        "creation_time": "2022-02-02T23:49:02Z",
        "last_change_time": "2024-11-13T21:38:46Z",
        "status": "NEW",
        "severity": "S4"
      },
      {
        "priority": "--",
        "component": "Graphics",
        "keywords": [
          "perf:resource-use",
          "power",
          "reproducible"
        ],
        "status": "NEW",
        "severity": "S3",
        "id": 1754796,
        "op_sys": "macOS",
        "last_change_time": "2024-09-12T14:49:13Z",
        "summary": "Scrolling through the all tabs menu uses 100% of a core painting",
        "creation_time": "2022-02-10T15:40:23Z"
      },
      {
        "component": "Performance: Memory",
        "keywords": [
          "perf:resource-use",
          "perf:responsiveness"
        ],
        "priority": "P2",
        "id": 1764227,
        "op_sys": "Unspecified",
        "last_change_time": "2025-04-24T22:18:24Z",
        "summary": "Out of Memory issue for ensonhaber.com",
        "creation_time": "2022-04-12T02:39:59Z",
        "status": "NEW",
        "severity": "S3"
      },
      {
        "priority": "P3",
        "keywords": [
          "perf:pageload",
          "perf:responsiveness",
          "priv-triaged"
        ],
        "component": "Privacy: Anti-Tracking",
        "status": "NEW",
        "severity": "S3",
        "summary": "Fenix page load is slower when using enhanced tracking protection",
        "creation_time": "2022-04-29T23:11:41Z",
        "last_change_time": "2024-06-04T15:26:33Z",
        "id": 1767103,
        "op_sys": "Unspecified"
      },
      {
        "component": "JavaScript Engine",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P3",
        "op_sys": "Unspecified",
        "id": 1769131,
        "creation_time": "2022-05-12T20:44:00Z",
        "last_change_time": "2023-03-07T12:05:49Z",
        "summary": "Firefox janks for ~1.5-2x as long as Chrome in click handler, when unchecking a topic at https://twitter.com/settings/your_twitter_data/twitter_interests",
        "severity": "S3",
        "status": "NEW"
      },
      {
        "component": "Graphics: WebRender",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "--",
        "id": 1771038,
        "op_sys": "Unspecified",
        "last_change_time": "2024-04-02T20:50:06Z",
        "creation_time": "2022-05-24T21:39:20Z",
        "summary": "RenderCompositorNativeOGL::WaitForGPU causes scroll jank on google docs",
        "status": "NEW",
        "severity": "S3"
      },
      {
        "component": "Widget: Win32",
        "keywords": [],
        "priority": "P3",
        "id": 1772422,
        "op_sys": "Windows",
        "last_change_time": "2022-09-01T14:23:36Z",
        "summary": "Fix recent slow performance in Windows shutdown",
        "creation_time": "2022-06-02T22:18:18Z",
        "status": "NEW",
        "severity": "S3"
      },
      {
        "status": "NEW",
        "severity": "S4",
        "id": 1773332,
        "op_sys": "All",
        "summary": "Jank when clicking image on Twitter",
        "creation_time": "2022-06-08T16:33:48Z",
        "last_change_time": "2022-09-06T16:40:12Z",
        "priority": "P3",
        "component": "JavaScript Engine",
        "keywords": [
          "perf:responsiveness"
        ]
      },
      {
        "severity": "S4",
        "status": "NEW",
        "creation_time": "2022-06-23T05:52:34Z",
        "summary": "wokwi.com - simulations much slower in FF than other browsers",
        "last_change_time": "2025-03-30T06:35:22Z",
        "op_sys": "Unspecified",
        "id": 1776131,
        "priority": "P3",
        "keywords": [
          "perf:animation",
          "perf:responsiveness"
        ],
        "component": "JavaScript Engine: JIT"
      },
      {
        "priority": "P3",
        "keywords": [
          "perf:animation",
          "perf:responsiveness",
          "top50"
        ],
        "component": "Layout",
        "status": "NEW",
        "severity": "S3",
        "summary": "Jank when exiting miniplayer on YouTube",
        "creation_time": "2022-07-01T22:54:00Z",
        "last_change_time": "2022-08-05T13:44:52Z",
        "id": 1777744,
        "op_sys": "Linux"
      },
      {
        "component": "Graphics",
        "keywords": [
          "perf:resource-use",
          "power",
          "reproducible"
        ],
        "priority": "--",
        "op_sys": "Unspecified",
        "id": 1777994,
        "creation_time": "2022-07-04T17:12:21Z",
        "summary": "Blinking the caret in the Firefox location bar uses a lot more GPU power than in other browsers",
        "last_change_time": "2025-03-11T08:59:02Z",
        "severity": "S4",
        "status": "NEW"
      },
      {
        "keywords": [
          "perf:pageload",
          "perf:responsiveness",
          "perf:startup",
          "reproducible"
        ],
        "component": "Storage: Quota Manager",
        "priority": "P2",
        "summary": "Firefox startup extremely slow after reboot (24 seconds wait in Web Extensions process from mozilla::dom::LSObject::EnsureDatabase)",
        "creation_time": "2022-07-07T11:21:45Z",
        "last_change_time": "2025-03-11T06:49:52Z",
        "id": 1778472,
        "op_sys": "Unspecified",
        "status": "NEW",
        "severity": "S3"
      },
      {
        "last_change_time": "2025-03-21T02:42:15Z",
        "summary": "Large performance difference when loading a PDF in \"performance\" vs \"energy saving\" mode",
        "creation_time": "2022-07-13T08:33:40Z",
        "op_sys": "Linux",
        "id": 1779363,
        "severity": "S4",
        "status": "NEW",
        "keywords": [
          "perf:pageload",
          "perf:resource-use",
          "reproducible"
        ],
        "component": "Performance: Navigation",
        "priority": "--"
      },
      {
        "last_change_time": "2025-06-17T12:38:35Z",
        "creation_time": "2022-10-06T15:36:45Z",
        "summary": "High CPU utilisation on idle from PurgeTrackerService",
        "op_sys": "Windows 10",
        "id": 1793980,
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf:resource-use"
        ],
        "component": "Privacy: Anti-Tracking",
        "priority": "P3"
      },
      {
        "priority": "--",
        "keywords": [
          "perf:resource-use",
          "top50"
        ],
        "component": "Graphics: WebRender",
        "severity": "--",
        "status": "NEW",
        "summary": "\"Ambient Mode\" on youtube uses a lot of GPU/CPU (particularly high impact with sw-wr)",
        "creation_time": "2022-10-30T15:46:27Z",
        "last_change_time": "2025-11-17T02:30:22Z",
        "op_sys": "Unspecified",
        "id": 1798206
      },
      {
        "priority": "--",
        "keywords": [
          "crash",
          "hang",
          "perf",
          "perf:responsiveness",
          "reproducible"
        ],
        "component": "Layout: Images, Video, and HTML Frames",
        "severity": "S3",
        "status": "NEW",
        "last_change_time": "2024-08-07T16:20:40Z",
        "creation_time": "2022-11-15T08:05:33Z",
        "summary": "\"Open Image in New Tab\" on very large data URL (11MB) is very slow or crashes browser",
        "op_sys": "All",
        "id": 1800596
      },
      {
        "status": "NEW",
        "severity": "S3",
        "summary": "Long site hang when searching on https://support.hp.com/",
        "last_change_time": "2022-12-01T09:42:11Z",
        "creation_time": "2022-11-19T12:52:25Z",
        "id": 1801478,
        "op_sys": "Unspecified",
        "priority": "--",
        "keywords": [
          "hang",
          "perf:pageload",
          "reproducible"
        ],
        "component": "CSS Parsing and Computation"
      },
      {
        "priority": "--",
        "component": "Performance",
        "keywords": [],
        "status": "NEW",
        "severity": "--",
        "id": 1807322,
        "op_sys": "Android",
        "last_change_time": "2025-03-11T08:38:35Z",
        "summary": "Long DNS resolution times (on start up only?)",
        "creation_time": "2022-12-23T20:44:10Z"
      },
      {
        "severity": "--",
        "status": "NEW",
        "summary": "Investigate creating a system to inline DOM bindings in Ion",
        "last_change_time": "2023-07-09T18:23:05Z",
        "creation_time": "2023-01-03T20:49:58Z",
        "op_sys": "Unspecified",
        "id": 1808403,
        "priority": "--",
        "keywords": [],
        "component": "DOM: Bindings (WebIDL)"
      },
      {
        "id": 1810550,
        "op_sys": "Android",
        "summary": "Tabs use \"excessive\" CPU when application is backgrounded",
        "last_change_time": "2025-10-14T14:13:49Z",
        "creation_time": "2023-01-16T15:58:57Z",
        "status": "NEW",
        "severity": "S3",
        "component": "Browser Engine",
        "keywords": [
          "perf:resource-use",
          "requested-mobile"
        ],
        "priority": "--"
      },
      {
        "priority": "P3",
        "component": "Privacy: Site Reports",
        "keywords": [
          "perf:pageload",
          "perf:responsiveness",
          "webcompat:tracker-blocking"
        ],
        "status": "NEW",
        "severity": "S3",
        "id": 1811843,
        "op_sys": "Windows 10",
        "creation_time": "2023-01-23T13:41:55Z",
        "last_change_time": "2025-11-18T17:54:46Z",
        "summary": "content loads extremely slow on accenture.com in ETP strict"
      },
      {
        "priority": "--",
        "component": "Graphics: WebRender",
        "keywords": [
          "perf:animation",
          "perf:pageload",
          "perf:resource-use"
        ],
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1812394,
        "last_change_time": "2024-04-03T01:58:09Z",
        "creation_time": "2023-01-25T18:49:57Z",
        "summary": "High parent-process CPU usage, with animated balloons SVG background-image"
      },
      {
        "priority": "--",
        "component": "Web Painting",
        "keywords": [
          "perf:pageload",
          "perf:responsiveness",
          "reproducible"
        ],
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1813325,
        "summary": "Pdf.js UI is very sluggish with a specific pdf",
        "last_change_time": "2024-05-22T16:53:04Z",
        "creation_time": "2023-01-28T17:37:06Z"
      },
      {
        "creation_time": "2023-01-31T11:32:11Z",
        "last_change_time": "2025-04-24T22:17:51Z",
        "summary": "The slow script warning notification bar  appears on www.sanwa.co.jp",
        "op_sys": "Windows 10",
        "id": 1814028,
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "nightly-community",
          "perf:pageload",
          "perf:responsiveness"
        ],
        "component": "Performance: Responsiveness",
        "priority": "P3"
      },
      {
        "id": 1819286,
        "op_sys": "Unspecified",
        "creation_time": "2023-02-28T10:32:56Z",
        "summary": "Firefox slows down abysmally after a week or so, having hundreds of tabs open (thousands of tabs in total)",
        "last_change_time": "2026-03-03T03:44:37Z",
        "status": "NEW",
        "severity": "S3",
        "component": "Widget: Win32",
        "keywords": [
          "perf:animation",
          "perf:pageload",
          "perf:resource-use",
          "perf:responsiveness"
        ],
        "priority": "P2"
      },
      {
        "status": "NEW",
        "severity": "S3",
        "id": 1823474,
        "op_sys": "Unspecified",
        "last_change_time": "2026-02-23T12:29:12Z",
        "summary": "Divi's intensive use of shadows on its demonstration page cause slow performance issues in Firefox on some graphics drivers",
        "creation_time": "2023-03-20T18:09:15Z",
        "priority": "--",
        "component": "Graphics: ImageLib",
        "keywords": [
          "perf:animation",
          "perf:responsiveness",
          "reproducible"
        ]
      },
      {
        "severity": "S3",
        "status": "NEW",
        "creation_time": "2023-03-29T16:21:47Z",
        "last_change_time": "2023-06-02T14:40:53Z",
        "summary": "Slow panning and zooming on cellmapper.net",
        "op_sys": "Windows 10",
        "id": 1825361,
        "priority": "--",
        "keywords": [
          "perf:animation",
          "perf:responsiveness",
          "reproducible"
        ],
        "component": "Graphics: Canvas2D"
      },
      {
        "priority": "--",
        "component": "Graphics: WebRender",
        "keywords": [
          "perf:animation",
          "perf:responsiveness",
          "regression",
          "reproducible",
          "top50"
        ],
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Android",
        "id": 1825395,
        "last_change_time": "2024-10-21T10:20:38Z",
        "summary": "Janky carousel on Apple India home page on Moto G Pure",
        "creation_time": "2023-03-29T18:54:30Z"
      },
      {
        "priority": "--",
        "keywords": [
          "perf:responsiveness",
          "regression",
          "reproducible"
        ],
        "component": "Graphics: WebRender",
        "severity": "S3",
        "status": "NEW",
        "last_change_time": "2024-04-03T01:38:35Z",
        "summary": "Codepen demo makes the browser unresponsive",
        "creation_time": "2023-04-07T16:31:38Z",
        "op_sys": "Unspecified",
        "id": 1826983
      },
      {
        "last_change_time": "2024-03-22T21:51:46Z",
        "summary": "High memory usage and slow/jerky text size increase animation on https://www.sbnation.com/a/17776-football",
        "creation_time": "2023-04-13T13:43:44Z",
        "id": 1827906,
        "op_sys": "Linux",
        "status": "NEW",
        "severity": "S3",
        "keywords": [
          "perf:animation",
          "perf:pageload",
          "perf:responsiveness"
        ],
        "component": "Graphics: WebRender",
        "priority": "P2"
      },
      {
        "priority": "P3",
        "keywords": [
          "perf:pageload",
          "perf:responsiveness"
        ],
        "component": "JavaScript Engine",
        "severity": "S3",
        "status": "NEW",
        "creation_time": "2023-04-19T17:00:43Z",
        "last_change_time": "2023-05-17T20:40:40Z",
        "summary": "50% slower than Chrome loading this Google Sheet with graphs",
        "op_sys": "All",
        "id": 1828961
      },
      {
        "priority": "--",
        "component": "Untriaged",
        "keywords": [
          "perf:animation",
          "perf:resource-use",
          "perf:responsiveness"
        ],
        "severity": "--",
        "status": "NEW",
        "op_sys": "Windows 11",
        "id": 1833016,
        "last_change_time": "2023-12-04T12:23:47Z",
        "summary": "Very high JS string memory usage and lots of structured-clone-holder, with lag and slowdowns",
        "creation_time": "2023-05-14T09:34:17Z"
      },
      {
        "priority": "--",
        "component": "Installer",
        "keywords": [
          "main-thread-io",
          "perf",
          "perf:startup"
        ],
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1833341,
        "last_change_time": "2023-08-09T17:24:18Z",
        "creation_time": "2023-05-16T09:19:01Z",
        "summary": "We read distribution.ini from the main thread on MSIX Firefoxen"
      },
      {
        "status": "NEW",
        "severity": "S3",
        "creation_time": "2023-06-07T21:29:32Z",
        "summary": "Page performance on Atlassian products (specifically Confluence) very slow and clunky when editing",
        "last_change_time": "2025-03-21T01:03:51Z",
        "id": 1837279,
        "op_sys": "All",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness",
          "reproducible"
        ],
        "component": "Performance: Responsiveness"
      },
      {
        "priority": "P2",
        "component": "Panning and Zooming",
        "keywords": [
          "perf:animation",
          "perf:responsiveness",
          "top50"
        ],
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Android",
        "id": 1838402,
        "last_change_time": "2026-02-17T17:40:37Z",
        "creation_time": "2023-06-14T09:46:01Z",
        "summary": "Sluggish horizontal scrolling on github.com"
      },
      {
        "keywords": [
          "perf:animation",
          "perf:resource-use",
          "perf:responsiveness",
          "reproducible"
        ],
        "component": "Graphics: WebRender",
        "priority": "--",
        "last_change_time": "2023-08-10T13:14:56Z",
        "creation_time": "2023-06-19T20:57:09Z",
        "summary": "svg high cpu usage",
        "op_sys": "Unspecified",
        "id": 1839242,
        "severity": "S3",
        "status": "NEW"
      },
      {
        "keywords": [
          "perf:responsiveness",
          "reproducible"
        ],
        "component": "DOM: Core & HTML",
        "priority": "--",
        "summary": "append/appendChild on large table is over 150x slower than Chromium",
        "creation_time": "2023-06-22T12:20:03Z",
        "last_change_time": "2024-01-16T21:25:25Z",
        "op_sys": "Unspecified",
        "id": 1839859,
        "severity": "S3",
        "status": "NEW"
      },
      {
        "priority": "P3",
        "keywords": [],
        "component": "JavaScript: GC",
        "severity": "S3",
        "status": "NEW",
        "summary": "~17 seconds in js::gc::GCRuntime::gcSlice with a large number of tabs, many Confluence",
        "creation_time": "2023-08-08T17:55:47Z",
        "last_change_time": "2024-12-03T18:29:11Z",
        "op_sys": "Unspecified",
        "id": 1847796
      },
      {
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Windows 11",
        "id": 1848440,
        "summary": "Scrolling YouTube Taste Profile page causes unresponsive content process after enough slow scrolling",
        "last_change_time": "2024-06-24T14:47:13Z",
        "creation_time": "2023-08-11T22:20:34Z",
        "priority": "P3",
        "component": "JavaScript Engine",
        "keywords": [
          "perf:responsiveness",
          "top50"
        ]
      },
      {
        "status": "NEW",
        "severity": "S3",
        "id": 1854921,
        "op_sys": "Unspecified",
        "summary": "Scripts in closed tabs keep using 100% of a CPU core",
        "creation_time": "2023-09-25T09:29:02Z",
        "last_change_time": "2025-05-23T13:44:31Z",
        "priority": "--",
        "component": "Performance: General",
        "keywords": [
          "perf:resource-use"
        ]
      },
      {
        "component": "Performance: General",
        "keywords": [],
        "priority": "--",
        "op_sys": "Unspecified",
        "id": 1858535,
        "creation_time": "2023-10-11T22:31:20Z",
        "summary": "Speedometer 3 score is ~1 point lower than Chrome on Windows 11 Surface Pro 7+ device, when on battery power",
        "last_change_time": "2024-01-24T06:47:52Z",
        "severity": "--",
        "status": "NEW"
      },
      {
        "status": "NEW",
        "severity": "S3",
        "summary": "PWebrtcGlobal::Reply_GetStats is very visible in hang reports",
        "creation_time": "2023-11-08T20:22:39Z",
        "last_change_time": "2024-12-16T17:53:10Z",
        "id": 1863805,
        "op_sys": "Unspecified",
        "priority": "--",
        "keywords": [
          "perf:resource-use",
          "perf:responsiveness"
        ],
        "component": "WebRTC: Audio/Video"
      },
      {
        "summary": "Slack is frozen/unresponsive when returning from sleep mode",
        "creation_time": "2023-11-28T20:05:14Z",
        "last_change_time": "2024-01-12T07:38:37Z",
        "op_sys": "macOS",
        "id": 1867118,
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf:resource-use",
          "perf:responsiveness"
        ],
        "component": "DOM: Performance APIs",
        "priority": "P3"
      },
      {
        "priority": "P3",
        "component": "mozglue",
        "keywords": [
          "perf:startup",
          "reproducible"
        ],
        "severity": "--",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1869589,
        "summary": "Pre-XUL Skeleton UI is flickering a bit and _may_ be causing a startup slowdown",
        "creation_time": "2023-12-12T18:01:30Z",
        "last_change_time": "2025-04-01T09:41:29Z"
      },
      {
        "id": 1871524,
        "op_sys": "All",
        "last_change_time": "2025-06-05T21:08:28Z",
        "summary": "Stuck at tabswitch spinner when opening a new tab",
        "creation_time": "2023-12-22T05:01:07Z",
        "status": "NEW",
        "severity": "S3",
        "component": "Graphics",
        "keywords": [
          "perf:responsiveness",
          "regressionwindow-wanted",
          "reproducible",
          "top50"
        ],
        "priority": "P2"
      },
      {
        "component": "Performance: Navigation",
        "keywords": [
          "perf:pageload",
          "reproducible",
          "webcompat:needs-diagnosis"
        ],
        "priority": "P3",
        "id": 1875307,
        "op_sys": "Windows 10",
        "summary": "The \"View in map\" image place holder loads slower compared to Chrome at expedia.com",
        "creation_time": "2024-01-18T15:40:58Z",
        "last_change_time": "2025-03-21T02:41:54Z",
        "status": "NEW",
        "severity": "S4"
      },
      {
        "priority": "--",
        "keywords": [
          "perf:startup"
        ],
        "component": "Performance: Startup",
        "severity": "N/A",
        "status": "NEW",
        "last_change_time": "2025-03-20T23:08:15Z",
        "creation_time": "2024-02-04T05:28:04Z",
        "summary": "Explore creating a \"maintainance\" process that does bunch of cleanup/query in the background while the browser is closed with the aim of improving Firefox startup",
        "op_sys": "Unspecified",
        "id": 1878531
      },
      {
        "last_change_time": "2025-03-21T01:04:10Z",
        "creation_time": "2024-02-15T18:00:38Z",
        "summary": "[linkedin.com] Adding multiple contacts in rapid succession feels slower on Firefox Nightly",
        "op_sys": "Windows 11",
        "id": 1880530,
        "severity": "--",
        "status": "NEW",
        "keywords": [
          "perf:animation",
          "perf:resource-use",
          "perf:responsiveness"
        ],
        "component": "Performance: Responsiveness",
        "priority": "--"
      },
      {
        "component": "Layout",
        "keywords": [
          "perf:animation",
          "top50"
        ],
        "priority": "P3",
        "op_sys": "Android",
        "id": 1882302,
        "last_change_time": "2024-06-11T08:25:26Z",
        "creation_time": "2024-02-27T13:56:00Z",
        "summary": "Navigation for product images slider is not smooth at ebay.com",
        "severity": "S4",
        "status": "NEW"
      },
      {
        "id": 1893884,
        "op_sys": "Unspecified",
        "summary": "Previewing a PDF file from within GitLab's UI is extremely slow, affects interaction with apparent hangs / freezes",
        "last_change_time": "2024-06-17T02:30:24Z",
        "creation_time": "2024-04-28T15:30:20Z",
        "status": "NEW",
        "severity": "S3",
        "component": "Graphics: Canvas2D",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "priority": "--"
      },
      {
        "id": 1894906,
        "op_sys": "Windows",
        "creation_time": "2024-05-03T13:26:24Z",
        "summary": "2x performance regression when rendering PDFs with smask",
        "last_change_time": "2024-09-02T12:20:00Z",
        "status": "NEW",
        "severity": "S3",
        "component": "Graphics: Canvas2D",
        "keywords": [
          "regression"
        ],
        "priority": "P3"
      },
      {
        "priority": "P3",
        "keywords": [
          "perf:pageload",
          "perf:responsiveness",
          "reproducible",
          "webcompat:site-wait"
        ],
        "component": "Site Reports",
        "severity": "S4",
        "status": "NEW",
        "last_change_time": "2025-09-15T16:50:57Z",
        "creation_time": "2024-05-17T12:13:33Z",
        "summary": "fales.itch.io - The game is stuck in a loading state",
        "op_sys": "Unspecified",
        "id": 1897427
      },
      {
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1899370,
        "summary": "Very slow loading https://www.darenc.gov in slow network conditions",
        "last_change_time": "2025-05-23T13:44:31Z",
        "creation_time": "2024-05-28T18:27:52Z",
        "priority": "--",
        "component": "Performance: General",
        "keywords": []
      },
      {
        "priority": "P3",
        "keywords": [
          "perf:responsiveness",
          "top50"
        ],
        "component": "JavaScript Engine",
        "status": "NEW",
        "severity": "S3",
        "creation_time": "2024-05-29T04:27:06Z",
        "summary": "Twitch chat unusably slow and using 25% CPU after a few days on a stream",
        "last_change_time": "2024-07-12T13:52:28Z",
        "id": 1899468,
        "op_sys": "Linux"
      },
      {
        "id": 1901608,
        "op_sys": "Unspecified",
        "summary": "In full-screen mode, hovering to reveal top toolbar causes jank from resizing the viewports of any tabs whose titles that you happen to hover (all of which resize to accomodate the space that the toolbar is briefly occupying)",
        "creation_time": "2024-06-10T18:42:24Z",
        "last_change_time": "2024-06-19T12:46:06Z",
        "status": "NEW",
        "severity": "S3",
        "component": "Tabbed Browser",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P3"
      },
      {
        "priority": "--",
        "component": "Graphics: CanvasWebGL",
        "keywords": [],
        "severity": "--",
        "status": "NEW",
        "op_sys": "All",
        "id": 1906276,
        "summary": "theweathernetwork.com - The map is populated slow compared to Chrome",
        "creation_time": "2024-07-04T11:59:12Z",
        "last_change_time": "2025-11-03T12:20:25Z"
      },
      {
        "component": "Networking",
        "keywords": [],
        "priority": "P2",
        "op_sys": "Unspecified",
        "id": 1906733,
        "summary": "Very long resource loads for https://www.girince.com",
        "last_change_time": "2025-07-22T12:12:11Z",
        "creation_time": "2024-07-08T19:41:13Z",
        "severity": "S3",
        "status": "NEW"
      },
      {
        "severity": "S4",
        "status": "NEW",
        "creation_time": "2024-08-01T07:49:52Z",
        "last_change_time": "2024-09-03T16:55:14Z",
        "summary": "msn.com - Gallery slideshow is laggy",
        "op_sys": "Windows 10",
        "id": 1911035,
        "priority": "P3",
        "keywords": [
          "perf",
          "top100"
        ],
        "component": "JavaScript Engine: JIT"
      },
      {
        "id": 1911450,
        "op_sys": "Unspecified",
        "last_change_time": "2025-03-11T08:51:42Z",
        "summary": "Opening reddit posts spends a lot of time on the parent process Part2 (Followup to bug 1907701)",
        "creation_time": "2024-08-04T02:59:11Z",
        "status": "NEW",
        "severity": "S3",
        "component": "Performance: General",
        "keywords": [],
        "priority": "--"
      },
      {
        "priority": "P3",
        "keywords": [
          "perf:responsiveness",
          "reproducible",
          "webcompat:platform-bug"
        ],
        "component": "DOM: Core & HTML",
        "severity": "S3",
        "status": "NEW",
        "last_change_time": "2025-04-25T14:40:48Z",
        "summary": "ebusiness.anb.com.sa - Page becomes unresponsive shortly after trying to enable location",
        "creation_time": "2024-08-12T09:29:30Z",
        "op_sys": "Unspecified",
        "id": 1912721
      },
      {
        "id": 1913842,
        "op_sys": "Unspecified",
        "last_change_time": "2024-10-01T18:43:40Z",
        "creation_time": "2024-08-19T23:25:36Z",
        "summary": "Register allocation and Ion compile times are too slow on Android during Speedometer3",
        "status": "NEW",
        "severity": "S4",
        "component": "JavaScript Engine: JIT",
        "keywords": [],
        "priority": "P2"
      },
      {
        "component": "General",
        "keywords": [
          "perf:resource-use",
          "perf:responsiveness",
          "top50"
        ],
        "priority": "--",
        "op_sys": "Unspecified",
        "id": 1918002,
        "summary": "Twitch.tv continuously crashing only on Firefox and causing memory leak",
        "creation_time": "2024-09-11T01:02:57Z",
        "last_change_time": "2025-03-23T04:04:57Z",
        "severity": "--",
        "status": "NEW"
      },
      {
        "priority": "P3",
        "keywords": [
          "perf:responsiveness",
          "webcompat:platform-bug"
        ],
        "component": "Networking",
        "status": "NEW",
        "severity": "S3",
        "summary": "Opening the WebGPU conformonce test suite page spends 2seconds on the parent process",
        "creation_time": "2024-09-14T10:41:08Z",
        "last_change_time": "2025-03-19T07:58:00Z",
        "id": 1918854,
        "op_sys": "Unspecified"
      },
      {
        "last_change_time": "2025-09-15T16:52:56Z",
        "creation_time": "2024-09-30T09:50:02Z",
        "summary": "economia.gov.br - Page takes very long to load",
        "id": 1921737,
        "op_sys": "Windows 10",
        "status": "NEW",
        "severity": "S3",
        "keywords": [
          "perf:pageload",
          "reproducible",
          "webcompat:site-report"
        ],
        "component": "Performance: Navigation",
        "priority": "P3"
      },
      {
        "component": "XML",
        "keywords": [],
        "priority": "--",
        "id": 1921956,
        "op_sys": "Unspecified",
        "summary": "Loading big XML file makes Firefox and even the windows system unusable",
        "creation_time": "2024-10-01T10:22:36Z",
        "last_change_time": "2025-09-11T06:16:56Z",
        "status": "NEW",
        "severity": "S3"
      },
      {
        "keywords": [],
        "component": "Startup and Profile System",
        "priority": "--",
        "summary": "Fenix shouldn't use `nsToolkitProfileService` to identify a profile folder",
        "creation_time": "2024-10-18T10:15:37Z",
        "last_change_time": "2025-09-15T15:54:05Z",
        "op_sys": "Android",
        "id": 1925480,
        "severity": "--",
        "status": "NEW"
      },
      {
        "priority": "--",
        "keywords": [],
        "component": "Performance: General",
        "severity": "S3",
        "status": "NEW",
        "creation_time": "2024-10-31T21:38:32Z",
        "summary": "Dutch Train planning websites significantly slower on Firefox compared to Chrome",
        "last_change_time": "2025-05-23T13:44:30Z",
        "op_sys": "Unspecified",
        "id": 1928530
      },
      {
        "priority": "--",
        "component": "Performance: General",
        "keywords": [],
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1928531,
        "creation_time": "2024-10-31T21:57:01Z",
        "summary": "Navigating to an article on FiveThirtyEight is significantly slower in Firefox",
        "last_change_time": "2025-05-23T13:44:33Z"
      },
      {
        "priority": "--",
        "keywords": [],
        "component": "Graphics: WebRender",
        "severity": "S3",
        "status": "NEW",
        "creation_time": "2024-11-13T21:41:13Z",
        "summary": "High CPU usage and mouse cursor lag when moving cursor rapidly over YouTube video player area in Firefox",
        "last_change_time": "2025-01-14T02:49:32Z",
        "op_sys": "Windows 10",
        "id": 1931071
      },
      {
        "component": "Graphics: CanvasWebGL",
        "keywords": [],
        "priority": "--",
        "id": 1931896,
        "op_sys": "Windows 11",
        "last_change_time": "2025-07-01T01:44:29Z",
        "creation_time": "2024-11-18T15:53:49Z",
        "summary": "atlassian.net - Performance issues with multiple tabs opened",
        "status": "NEW",
        "severity": "S3"
      },
      {
        "status": "NEW",
        "severity": "--",
        "id": 1938191,
        "op_sys": "Unspecified",
        "summary": "High CPU usage on google spreadsheet",
        "last_change_time": "2025-01-06T12:32:49Z",
        "creation_time": "2024-12-18T19:27:52Z",
        "priority": "--",
        "component": "Performance: General",
        "keywords": []
      },
      {
        "priority": "--",
        "keywords": [
          "perf",
          "power"
        ],
        "component": "CSS Parsing and Computation",
        "status": "NEW",
        "severity": "--",
        "last_change_time": "2025-03-07T12:09:08Z",
        "creation_time": "2024-12-28T21:20:57Z",
        "summary": "Deleting files from Google Drive with a huge amount of files within a folder is very slow and causes high CPU load",
        "id": 1939360,
        "op_sys": "Unspecified"
      },
      {
        "id": 1939867,
        "op_sys": "Android",
        "last_change_time": "2025-12-19T16:09:17Z",
        "summary": "Firefox on Android crashes on navigator.tu-dresden.de, sometimes android UI also becomes unresponsive",
        "creation_time": "2025-01-03T14:48:45Z",
        "status": "NEW",
        "severity": "S2",
        "component": "Graphics: Canvas2D",
        "keywords": [
          "stalled"
        ],
        "priority": "P2"
      },
      {
        "priority": "--",
        "keywords": [
          "perf:animation",
          "perf:responsiveness",
          "reproducible"
        ],
        "component": "Graphics: WebRender",
        "severity": "S3",
        "status": "NEW",
        "creation_time": "2025-01-13T13:28:12Z",
        "summary": "woven-city.global | Low SVG path Animation framerate",
        "last_change_time": "2025-01-22T16:39:48Z",
        "op_sys": "All",
        "id": 1941329
      },
      {
        "op_sys": "Unspecified",
        "id": 1942116,
        "summary": "MemoryTelemetry::GatherReports continues to run even if telemetry is disabled",
        "last_change_time": "2025-01-16T17:38:29Z",
        "creation_time": "2025-01-16T17:06:29Z",
        "severity": "--",
        "status": "NEW",
        "component": "XPCOM",
        "keywords": [],
        "priority": "--"
      },
      {
        "severity": "--",
        "status": "NEW",
        "summary": "Firefox's \"List all tabs\" menu janks for a long time if you have hundreds of tabs open with large-filesize favicons (e.g. bugzilla)",
        "last_change_time": "2025-03-31T12:09:35Z",
        "creation_time": "2025-01-27T19:18:29Z",
        "op_sys": "Unspecified",
        "id": 1944111,
        "priority": "--",
        "keywords": [],
        "component": "Tabbed Browser"
      },
      {
        "priority": "--",
        "component": "Tabbed Browser",
        "keywords": [],
        "severity": "--",
        "status": "NEW",
        "op_sys": "Unspecified",
        "id": 1946081,
        "creation_time": "2025-02-05T13:42:19Z",
        "summary": "1.6s Reflow on parent-process when hovering mouse over the \"JSON(experimental)\" button on Perfherder (due to shaping gigantic URI for status panel)",
        "last_change_time": "2025-02-27T12:08:31Z"
      },
      {
        "severity": "--",
        "status": "NEW",
        "last_change_time": "2026-01-07T18:58:38Z",
        "summary": "Too much time spent in gfxMacPlatformFontList::DeprecatedFamilyIsAvailable during startup",
        "creation_time": "2025-02-05T23:11:50Z",
        "op_sys": "Unspecified",
        "id": 1946248,
        "priority": "--",
        "keywords": [
          "perf"
        ],
        "component": "Graphics: Text"
      },
      {
        "priority": "P3",
        "component": "Performance: Responsiveness",
        "keywords": [
          "perf:animation",
          "perf:responsiveness",
          "reproducible"
        ],
        "status": "NEW",
        "severity": "S3",
        "id": 1946264,
        "op_sys": "Unspecified",
        "creation_time": "2025-02-06T01:01:17Z",
        "summary": "OpenStreetMap: Rapid Editor hitches severely",
        "last_change_time": "2025-06-17T04:29:00Z"
      },
      {
        "id": 1946454,
        "op_sys": "Android",
        "last_change_time": "2026-03-02T15:47:20Z",
        "summary": "duckduckgo.com - Jumpy/glitchy when pinch zooming the map",
        "creation_time": "2025-02-06T15:08:56Z",
        "status": "NEW",
        "severity": "S3",
        "component": "DOM: Events",
        "keywords": [
          "perf:animation",
          "perf:responsiveness",
          "reproducible",
          "webcompat:platform-bug",
          "webcompat:site-report"
        ],
        "priority": "--"
      },
      {
        "priority": "--",
        "keywords": [],
        "component": "Performance: Responsiveness",
        "severity": "S3",
        "status": "NEW",
        "summary": "Websites keep hanging for a few seconds all the time (3s-5s long CC on youtube)",
        "creation_time": "2025-03-15T13:27:13Z",
        "last_change_time": "2025-10-08T10:19:50Z",
        "op_sys": "Unspecified",
        "id": 1954284
      },
      {
        "priority": "P3",
        "keywords": [],
        "component": "Performance: Responsiveness",
        "status": "NEW",
        "severity": "S3",
        "summary": "open.spotify.com - Longer time to load the page and respond to actions",
        "last_change_time": "2025-04-24T18:53:41Z",
        "creation_time": "2025-03-20T10:16:37Z",
        "id": 1955219,
        "op_sys": "Windows 10"
      },
      {
        "component": "Performance: Responsiveness",
        "keywords": [],
        "priority": "P3",
        "op_sys": "Unspecified",
        "id": 1955749,
        "creation_time": "2025-03-22T11:55:14Z",
        "summary": "Severe jank when scrolling and clicking on messages in large message list on Yahoo Mail",
        "last_change_time": "2025-11-05T21:19:01Z",
        "severity": "S3",
        "status": "NEW"
      },
      {
        "op_sys": "Android",
        "id": 1963322,
        "last_change_time": "2025-06-02T15:59:55Z",
        "summary": "aeoneshop.com - Delay when interacting with the page elements, such as the search bar",
        "creation_time": "2025-04-29T11:56:11Z",
        "severity": "S3",
        "status": "NEW",
        "component": "Performance: Responsiveness",
        "keywords": [],
        "priority": "P3"
      },
      {
        "priority": "P5",
        "keywords": [],
        "component": "Telemetry",
        "severity": "S4",
        "status": "NEW",
        "creation_time": "2025-05-23T13:52:51Z",
        "summary": "Telemetry code in the parent process is doing some slow operations to save the \"aborted-session\"-reason \"main\" ping",
        "last_change_time": "2025-06-16T13:02:46Z",
        "op_sys": "Unspecified",
        "id": 1968247
      },
      {
        "component": "Graphics: Canvas2D",
        "keywords": [
          "webcompat:site-report"
        ],
        "priority": "--",
        "id": 1969397,
        "op_sys": "Android",
        "creation_time": "2025-05-30T05:51:18Z",
        "summary": "zoom.earth - Slow/Laggy map navigation (time spent in canvas2d)",
        "last_change_time": "2026-02-05T15:52:19Z",
        "status": "NEW",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "status": "NEW",
        "op_sys": "All",
        "id": 1982012,
        "last_change_time": "2025-09-16T20:19:03Z",
        "creation_time": "2025-08-08T12:34:25Z",
        "summary": "alveusgg-website-git-mattipv4-slideshow-blur-alveus.vercel.app - The page and elements are loading slower compared to Chrome",
        "priority": "--",
        "component": "Graphics: WebRender",
        "keywords": [
          "perf:pageload",
          "perf:responsiveness",
          "reproducible"
        ]
      },
      {
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Windows 10",
        "id": 1999301,
        "summary": "www.arthurvasseur.fr - Freezes/Stutters slightly when scrolling the page due to large data:-URL in faviconUrl in tabs.onUpdated",
        "creation_time": "2025-11-10T15:30:29Z",
        "last_change_time": "2026-01-20T15:40:07Z",
        "priority": "P3",
        "component": "General",
        "keywords": []
      },
      {
        "component": "Panning and Zooming",
        "keywords": [
          "webcompat:needs-diagnosis",
          "webcompat:site-report"
        ],
        "priority": "P2",
        "op_sys": "Android",
        "id": 2000834,
        "summary": "www.assembly.ca.gov - Scrolling is slow/sluggish",
        "creation_time": "2025-11-18T12:45:15Z",
        "last_change_time": "2026-02-05T15:46:15Z",
        "severity": "S3",
        "status": "NEW"
      },
      {
        "priority": "P3",
        "keywords": [],
        "component": "JavaScript Engine",
        "status": "NEW",
        "severity": "S4",
        "summary": "toBase64 is very slow",
        "creation_time": "2025-12-01T16:45:51Z",
        "last_change_time": "2025-12-10T20:55:46Z",
        "id": 2003299,
        "op_sys": "Unspecified"
      },
      {
        "status": "NEW",
        "severity": "N/A",
        "id": 2003305,
        "op_sys": "Unspecified",
        "summary": "fromBase64 is very slow",
        "creation_time": "2025-12-01T16:55:03Z",
        "last_change_time": "2025-12-10T21:09:45Z",
        "priority": "P3",
        "component": "JavaScript Engine",
        "keywords": []
      },
      {
        "priority": "--",
        "keywords": [],
        "component": "Graphics: WebRender",
        "severity": "S3",
        "status": "NEW",
        "last_change_time": "2026-02-08T18:36:12Z",
        "summary": "store.steampowered.com - GPU usage significantly increases causing performance issue",
        "creation_time": "2025-12-03T13:45:02Z",
        "op_sys": "Windows",
        "id": 2003795
      },
      {
        "priority": "--",
        "component": "Audio/Video: Playback",
        "keywords": [],
        "severity": "S3",
        "status": "NEW",
        "op_sys": "Windows 11",
        "id": 2007114,
        "last_change_time": "2026-01-11T23:34:41Z",
        "summary": "www.bilibili.com -  Excessive GPU resources are being used during video play with \"danmaku\" feature enabled",
        "creation_time": "2025-12-19T14:09:06Z"
      },
      {
        "status": "NEW",
        "severity": "S3",
        "last_change_time": "2026-02-12T03:27:16Z",
        "summary": "Page does not load in FF, does load in Edge",
        "creation_time": "2026-01-17T11:27:55Z",
        "id": 2011031,
        "op_sys": "Unspecified",
        "priority": "P3",
        "keywords": [
          "regressionwindow-wanted"
        ],
        "component": "Layout"
      },
      {
        "severity": "S3",
        "status": "REOPENED",
        "op_sys": "All",
        "id": 1135277,
        "creation_time": "2015-02-20T23:16:42Z",
        "summary": "Pathologically slow pdf rendering",
        "last_change_time": "2023-05-29T18:03:42Z",
        "priority": "P3",
        "component": "PDF Viewer",
        "keywords": [
          "perf:pageload"
        ]
      },
      {
        "keywords": [
          "perf:resource-use",
          "power"
        ],
        "component": "Graphics: WebRender",
        "priority": "P3",
        "creation_time": "2018-10-30T14:03:28Z",
        "last_change_time": "2025-01-17T22:09:40Z",
        "summary": "Animated page load throbber causes a permanent ~9% CPU load for Renderer threads of the main process",
        "id": 1503259,
        "op_sys": "Unspecified",
        "status": "REOPENED",
        "severity": "S3"
      },
      {
        "status": "REOPENED",
        "severity": "S3",
        "creation_time": "2019-01-09T00:48:44Z",
        "summary": "Avoid collection during page load",
        "last_change_time": "2022-10-11T22:22:34Z",
        "id": 1518677,
        "op_sys": "Unspecified",
        "priority": "P3",
        "keywords": [
          "perf:pageload"
        ],
        "component": "JavaScript: GC"
      },
      {
        "priority": "P3",
        "component": "Audio/Video: GMP",
        "keywords": [
          "perf:startup"
        ],
        "severity": "--",
        "status": "REOPENED",
        "op_sys": "Unspecified",
        "id": 1522930,
        "summary": "GMP initialization does main thread I/O at startup",
        "last_change_time": "2022-05-03T14:29:08Z",
        "creation_time": "2019-01-25T19:00:18Z"
      },
      {
        "priority": "P3",
        "component": "Crash Reporting",
        "keywords": [
          "main-thread-io",
          "perf",
          "perf:responsiveness",
          "perf:startup"
        ],
        "severity": "S3",
        "status": "REOPENED",
        "op_sys": "Unspecified",
        "id": 1541603,
        "last_change_time": "2024-04-18T12:18:07Z",
        "creation_time": "2019-04-03T21:40:42Z",
        "summary": "MakeOrSetMinidumpPath shouldn't bother doing IO and just set the env var, leaving the crash reporter to create the minidumps folder if necessary"
      },
      {
        "priority": "--",
        "keywords": [
          "perf:responsiveness"
        ],
        "component": "CSS Parsing and Computation",
        "status": "REOPENED",
        "severity": "S3",
        "creation_time": "2020-04-15T22:49:40Z",
        "last_change_time": "2024-04-08T18:10:05Z",
        "summary": "Slow loading and closing of reddit posts on Moto G (XT1031)",
        "id": 1630442,
        "op_sys": "Android"
      },
      {
        "creation_time": "2020-08-27T22:50:59Z",
        "summary": "Firefox 79.0.5 struggles with reddit videos.",
        "last_change_time": "2025-04-24T20:28:11Z",
        "id": 1661594,
        "op_sys": "Android",
        "status": "REOPENED",
        "severity": "S3",
        "keywords": [
          "perf:responsiveness"
        ],
        "component": "Performance: Responsiveness",
        "priority": "P2"
      },
      {
        "keywords": [
          "perf:resource-use",
          "power"
        ],
        "component": "CSS Transitions and Animations",
        "priority": "--",
        "summary": "CSS animation causing 60Hz restyles despite the current and next animation steps being identical",
        "creation_time": "2021-08-25T16:03:34Z",
        "last_change_time": "2022-03-02T16:44:56Z",
        "id": 1727584,
        "op_sys": "Unspecified",
        "status": "REOPENED",
        "severity": "S3"
      },
      {
        "status": "REOPENED",
        "severity": "S3",
        "id": 1768308,
        "op_sys": "Windows 10",
        "summary": "Jank zooming/panning Google Maps due to not running refresh driver often enough",
        "creation_time": "2022-05-07T10:27:28Z",
        "last_change_time": "2023-11-20T22:31:47Z",
        "priority": "P2",
        "component": "Layout",
        "keywords": [
          "nightly-community",
          "perf:responsiveness",
          "regression"
        ]
      },
      {
        "priority": "P2",
        "keywords": [
          "perf:resource-use",
          "perf:responsiveness",
          "top50"
        ],
        "component": "Performance: Responsiveness",
        "severity": "S3",
        "status": "REOPENED",
        "summary": "Excessive memory usage on Twitch and Youtube",
        "creation_time": "2022-07-09T18:48:52Z",
        "last_change_time": "2026-02-13T16:04:58Z",
        "op_sys": "Windows 10",
        "id": 1778853
      },
      {
        "op_sys": "Unspecified",
        "id": 1838865,
        "creation_time": "2023-06-16T13:13:12Z",
        "last_change_time": "2025-05-14T18:41:15Z",
        "summary": "Viewing large PDF causes persistent high CPU and makes Firefox UI unresponsive",
        "severity": "S3",
        "status": "REOPENED",
        "component": "Graphics: WebRender",
        "keywords": [
          "perf:resource-use",
          "reproducible"
        ],
        "priority": "--"
      },
      {
        "priority": "--",
        "keywords": [
          "perf:pageload"
        ],
        "component": "General",
        "severity": "S3",
        "status": "REOPENED",
        "creation_time": "2024-03-08T16:40:04Z",
        "summary": "Frequent inability to use 'back'",
        "last_change_time": "2025-10-06T18:32:45Z",
        "op_sys": "Android",
        "id": 1884394
      },
      {
        "summary": "severe browser lags and high CPU and RAM usage on vk.com",
        "last_change_time": "2025-05-27T18:27:16Z",
        "creation_time": "2025-01-31T08:41:40Z",
        "op_sys": "Unspecified",
        "id": 1945048,
        "severity": "S3",
        "status": "REOPENED",
        "keywords": [],
        "component": "Performance: General",
        "priority": "--"
      },
      {
        "status": "REOPENED",
        "severity": "S2",
        "id": 1993424,
        "op_sys": "Android",
        "last_change_time": "2026-01-06T14:43:22Z",
        "creation_time": "2025-10-09T08:18:19Z",
        "summary": "The list of open tabs is very slow to update and firefox UI hangs when I close just one",
        "priority": "--",
        "component": "Tabs",
        "keywords": [
          "perf:responsiveness",
          "regression",
          "regressionwindow-wanted",
          "reproducible"
        ]
      },
      {
        "id": 1320745,
        "op_sys": "Unspecified",
        "last_change_time": "2024-11-27T10:42:35Z",
        "summary": "Download speeds limited on gigabit internet connection",
        "creation_time": "2016-11-28T18:57:11Z",
        "status": "UNCONFIRMED",
        "severity": "S3",
        "component": "Networking",
        "keywords": [
          "perf"
        ],
        "priority": "P3"
      },
      {
        "severity": "S3",
        "status": "UNCONFIRMED",
        "op_sys": "macOS",
        "id": 1519622,
        "creation_time": "2019-01-12T11:08:04Z",
        "last_change_time": "2024-11-28T10:23:36Z",
        "summary": "Bad performance on https://musicmap.info when zooming with webrender enabled (svg/blob)",
        "priority": "P3",
        "component": "Graphics: WebRender",
        "keywords": []
      },
      {
        "keywords": [
          "hang",
          "perf:responsiveness"
        ],
        "component": "Session Restore",
        "priority": "P3",
        "summary": "hanging + keyboard malfunction",
        "creation_time": "2019-11-05T02:17:38Z",
        "last_change_time": "2022-10-11T23:32:50Z",
        "id": 1593876,
        "op_sys": "Unspecified",
        "status": "UNCONFIRMED",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "status": "UNCONFIRMED",
        "op_sys": "Unspecified",
        "id": 1622455,
        "creation_time": "2020-03-13T23:15:04Z",
        "last_change_time": "2025-03-21T01:03:40Z",
        "summary": "Firefox tab freezes when a huge log is displayed on Github Actions",
        "priority": "P2",
        "component": "Performance: Responsiveness",
        "keywords": [
          "hang",
          "perf:responsiveness"
        ]
      },
      {
        "priority": "--",
        "component": "Graphics: CanvasWebGL",
        "keywords": [
          "perf:responsiveness"
        ],
        "severity": "S3",
        "status": "UNCONFIRMED",
        "op_sys": "Unspecified",
        "id": 1662811,
        "summary": "Inconsistent & fluctuating FPS on webgl based sites",
        "last_change_time": "2022-10-24T11:19:14Z",
        "creation_time": "2020-09-02T16:22:49Z"
      },
      {
        "component": "Performance: Responsiveness",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P3",
        "id": 1678512,
        "op_sys": "Unspecified",
        "summary": "Firefox slowing down to a crawl when using Whatsapp Web for several days",
        "creation_time": "2020-11-20T03:36:45Z",
        "last_change_time": "2025-04-24T20:34:07Z",
        "status": "UNCONFIRMED",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "status": "UNCONFIRMED",
        "op_sys": "Windows 10",
        "id": 1694126,
        "creation_time": "2021-02-22T11:25:53Z",
        "summary": "Drafting longer e-mails in outlook.office.com frequently freezes / slowdowns, due to spell check / ProofingPlugin.js?",
        "last_change_time": "2025-03-21T01:04:32Z",
        "priority": "P3",
        "component": "Performance: Responsiveness",
        "keywords": [
          "perf:responsiveness"
        ]
      },
      {
        "status": "UNCONFIRMED",
        "severity": "S3",
        "id": 1717016,
        "op_sys": "Unspecified",
        "summary": "High CPU usage on youtube",
        "last_change_time": "2025-12-08T01:01:45Z",
        "creation_time": "2021-06-17T14:00:43Z",
        "priority": "P2",
        "component": "Performance: General",
        "keywords": [
          "perf:resource-use"
        ]
      },
      {
        "id": 1738939,
        "op_sys": "Unspecified",
        "creation_time": "2021-11-02T16:37:39Z",
        "summary": "Firefox 94 Download Speed Less Than Half Of Google Chrome",
        "last_change_time": "2025-11-18T17:10:35Z",
        "status": "UNCONFIRMED",
        "severity": "S3",
        "component": "Networking: HTTP",
        "keywords": [
          "parity-chrome",
          "perf"
        ],
        "priority": "P3"
      },
      {
        "keywords": [
          "perf:responsiveness"
        ],
        "component": "Graphics: WebRender",
        "priority": "P2",
        "summary": "https://acko.net/files/slacko/ is very slow when scrolling, much jank",
        "last_change_time": "2023-03-30T22:28:37Z",
        "creation_time": "2021-12-08T21:14:00Z",
        "id": 1745050,
        "op_sys": "Unspecified",
        "status": "UNCONFIRMED",
        "severity": "S3"
      },
      {
        "status": "UNCONFIRMED",
        "severity": "S3",
        "id": 1750144,
        "op_sys": "Unspecified",
        "creation_time": "2022-01-14T04:25:05Z",
        "summary": "Insane memory usage & incorrect reporting on Emscripten website",
        "last_change_time": "2025-05-23T13:32:14Z",
        "priority": "--",
        "component": "Performance: Memory",
        "keywords": [
          "perf:resource-use"
        ]
      },
      {
        "priority": "P3",
        "keywords": [
          "perf:resource-use",
          "perf:responsiveness"
        ],
        "component": "Performance: Responsiveness",
        "severity": "S3",
        "status": "UNCONFIRMED",
        "last_change_time": "2025-04-24T22:14:24Z",
        "summary": "High memory and CPU usage with many tabs and no tab unloading",
        "creation_time": "2023-04-30T02:13:08Z",
        "op_sys": "Linux",
        "id": 1830648
      },
      {
        "status": "UNCONFIRMED",
        "severity": "--",
        "id": 1838205,
        "op_sys": "Unspecified",
        "last_change_time": "2025-10-22T10:46:27Z",
        "creation_time": "2023-06-13T12:38:04Z",
        "summary": "Firefox Performance issue",
        "priority": "--",
        "component": "Audio/Video",
        "keywords": [
          "perf:resource-use",
          "top50"
        ]
      },
      {
        "keywords": [],
        "component": "Storage: Cache API",
        "priority": "P3",
        "creation_time": "2023-06-27T21:55:16Z",
        "last_change_time": "2024-11-25T20:29:54Z",
        "summary": "Ensure Cache API profiler markers allow investigation of problems like: DomCache(?) slowing Youtube loading/browsing",
        "id": 1840725,
        "op_sys": "Unspecified",
        "status": "UNCONFIRMED",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "status": "UNCONFIRMED",
        "creation_time": "2023-07-04T14:45:31Z",
        "last_change_time": "2025-07-10T14:50:39Z",
        "summary": "'tup' cookie causes laggy/janky Google Maps performance when dragging",
        "op_sys": "Unspecified",
        "id": 1841643,
        "priority": "P3",
        "keywords": [
          "perf:animation",
          "perf:responsiveness",
          "top50"
        ],
        "component": "Performance: Responsiveness"
      },
      {
        "severity": "S3",
        "status": "UNCONFIRMED",
        "op_sys": "Unspecified",
        "id": 1847838,
        "summary": "memory",
        "creation_time": "2023-08-08T21:57:22Z",
        "last_change_time": "2025-04-24T22:01:14Z",
        "priority": "P3",
        "component": "Performance: Memory",
        "keywords": [
          "perf:resource-use",
          "perf:responsiveness"
        ]
      },
      {
        "op_sys": "Android",
        "id": 1870405,
        "summary": "Very slow time to first page load when opening Fenix with hundreds of tabs",
        "creation_time": "2023-12-15T22:43:19Z",
        "last_change_time": "2025-11-21T18:52:16Z",
        "severity": "S4",
        "status": "UNCONFIRMED",
        "component": "Performance",
        "keywords": [
          "perf:pageload",
          "perf:responsiveness",
          "perf:startup"
        ],
        "priority": "P5"
      },
      {
        "component": "Performance: General",
        "keywords": [],
        "priority": "--",
        "id": 1922534,
        "op_sys": "Unspecified",
        "last_change_time": "2025-05-23T13:44:32Z",
        "summary": "Firefox takes 100% of one CPU core for each facebook tab opened",
        "creation_time": "2024-10-03T13:51:14Z",
        "status": "UNCONFIRMED",
        "severity": "S3"
      },
      {
        "priority": "--",
        "component": "Performance: General",
        "keywords": [],
        "severity": "S3",
        "status": "UNCONFIRMED",
        "op_sys": "Unspecified",
        "id": 1942478,
        "creation_time": "2025-01-18T22:30:52Z",
        "last_change_time": "2025-09-19T06:22:39Z",
        "summary": "Slow opening of onlyoffice document in nextcloud"
      },
      {
        "priority": "--",
        "component": "Performance: General",
        "keywords": [],
        "status": "UNCONFIRMED",
        "severity": "--",
        "id": 1958996,
        "op_sys": "Unspecified",
        "creation_time": "2025-04-07T23:01:27Z",
        "summary": "4s of freeze/jank on youtube.com front page after hovering items",
        "last_change_time": "2025-05-12T13:14:19Z"
      },
      {
        "last_change_time": "2026-01-07T19:55:56Z",
        "summary": "Google Maps framedrops when I'm panning the map",
        "creation_time": "2025-05-11T20:43:26Z",
        "id": 1965718,
        "op_sys": "Windows 11",
        "status": "UNCONFIRMED",
        "severity": "S3",
        "keywords": [],
        "component": "Graphics: CanvasWebGL",
        "priority": "--"
      },
      {
        "priority": "--",
        "keywords": [],
        "component": "Performance: Memory",
        "status": "UNCONFIRMED",
        "severity": "--",
        "creation_time": "2025-07-04T10:29:57Z",
        "last_change_time": "2026-01-05T12:18:08Z",
        "summary": "20GB of heap-unclassified in the main process",
        "id": 1975701,
        "op_sys": "Unspecified"
      },
      {
        "severity": "--",
        "status": "UNCONFIRMED",
        "op_sys": "Unspecified",
        "id": 1978340,
        "creation_time": "2025-07-21T14:39:15Z",
        "summary": "Ghost windows when navigating ancestry.com",
        "last_change_time": "2025-10-08T11:38:20Z",
        "priority": "--",
        "component": "Performance: Memory",
        "keywords": [
          "perf:resource-use"
        ]
      },
      {
        "status": "UNCONFIRMED",
        "severity": "S3",
        "summary": "Firefox unable to load pages or make network requests when other processes are using high CPU on Mac",
        "last_change_time": "2026-01-22T14:14:08Z",
        "creation_time": "2025-10-15T22:46:20Z",
        "id": 1994549,
        "op_sys": "Unspecified",
        "priority": "--",
        "keywords": [],
        "component": "Performance: Navigation"
      },
      {
        "creation_time": "2025-10-26T22:16:51Z",
        "summary": "performance issues on www.rmcbfmplay.com",
        "last_change_time": "2026-03-11T13:58:31Z",
        "id": 1996484,
        "op_sys": "Android",
        "status": "UNCONFIRMED",
        "severity": "S3",
        "keywords": [],
        "component": "Audio/Video",
        "priority": "P3"
      },
      {
        "keywords": [],
        "component": "Performance",
        "priority": "--",
        "summary": "With many tabs open in vertical tabs mode, hover prelight (and text preview card without thumbnail) is very laggy",
        "creation_time": "2026-02-13T02:53:14Z",
        "last_change_time": "2026-03-12T05:02:20Z",
        "op_sys": "Linux",
        "id": 2016616,
        "severity": "--",
        "status": "UNCONFIRMED"
      }
    ]
  },
  "low": {
    "bugs": [
      {
        "id": 1341913,
        "last_change_time": "2025-04-24T15:29:17Z",
        "component": "Graphics",
        "creation_time": "2017-02-22T23:15:05Z",
        "severity": "S3",
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "status": "ASSIGNED",
        "op_sys": "Unspecified",
        "summary": "Stop looking up GLContext symbols for every new window"
      },
      {
        "keywords": [
          "perf:pageload"
        ],
        "priority": "P1",
        "status": "ASSIGNED",
        "op_sys": "Android",
        "summary": "Delayed image loading on low end ARM devices",
        "id": 1522282,
        "last_change_time": "2025-03-21T02:42:31Z",
        "component": "Performance: Navigation",
        "creation_time": "2019-01-23T21:52:44Z",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "id": 1631949,
        "last_change_time": "2022-10-12T00:08:45Z",
        "creation_time": "2020-04-21T20:52:29Z",
        "component": "Graphics",
        "summary": "Investigate merging shader cache files",
        "op_sys": "Unspecified",
        "keywords": [
          "perf:startup"
        ],
        "priority": "P3",
        "status": "ASSIGNED"
      },
      {
        "severity": "S4",
        "last_change_time": "2026-02-03T20:36:38Z",
        "id": 2008619,
        "creation_time": "2026-01-05T20:54:42Z",
        "component": "Graphics: Text",
        "op_sys": "Unspecified",
        "summary": "Text shaping word cache adds a lot of overhead during Editor-TipTap",
        "status": "ASSIGNED",
        "priority": "--",
        "keywords": []
      },
      {
        "status": "NEW",
        "keywords": [
          "blocked-ux",
          "perf"
        ],
        "priority": "P3",
        "summary": "Poor performance using bookmarks menu with large amounts of bookmarks.",
        "op_sys": "Windows Vista",
        "id": 486378,
        "last_change_time": "2023-05-16T02:23:47Z",
        "creation_time": "2009-04-01T20:00:41Z",
        "component": "Bookmarks & History",
        "severity": "S3"
      },
      {
        "status": "NEW",
        "keywords": [
          "main-thread-io",
          "meta",
          "perf",
          "perf:frontend",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "summary": "[meta] Implement an Asynchronous API for opening container query nodes",
        "op_sys": "All",
        "last_change_time": "2025-03-11T07:58:22Z",
        "id": 490714,
        "creation_time": "2009-04-29T22:35:30Z",
        "component": "Places",
        "severity": "N/A"
      },
      {
        "op_sys": "All",
        "summary": "{inc} Resizing window is slow for long list with multicol (from \"-moz-column-count: 3\" or \"column-width: 20em;\")",
        "priority": "--",
        "keywords": [
          "perf",
          "perf:responsiveness",
          "testcase"
        ],
        "status": "NEW",
        "severity": "S3",
        "component": "Layout: Columns",
        "creation_time": "2010-06-29T14:36:04Z",
        "id": 575614,
        "last_change_time": "2022-10-10T22:59:55Z"
      },
      {
        "summary": "Very slow chrome to content DOM access",
        "op_sys": "macOS",
        "status": "NEW",
        "priority": "--",
        "keywords": [
          "perf",
          "perf:pageload"
        ],
        "severity": "S3",
        "component": "XPConnect",
        "creation_time": "2010-11-19T15:34:28Z",
        "last_change_time": "2025-03-11T08:46:07Z",
        "id": 613498
      },
      {
        "creation_time": "2011-03-31T18:37:55Z",
        "component": "Widget",
        "id": 646937,
        "last_change_time": "2022-10-10T23:24:13Z",
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf",
          "perf:resource-use"
        ],
        "priority": "P3",
        "summary": "throttle animation in completely obscured windows (virtual desktop, minimised, hidden behind other fullscreened windows)",
        "op_sys": "Linux"
      },
      {
        "summary": "Repeated calls to location.hash = \"#foo\" cause large amounts of disk activity",
        "op_sys": "All",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "status": "NEW",
        "severity": "S3",
        "id": 661590,
        "last_change_time": "2025-09-29T14:01:38Z",
        "component": "Places",
        "creation_time": "2011-06-02T18:09:59Z"
      },
      {
        "summary": "Compositing/present still hapens when the only changing parts are out of the viewport",
        "op_sys": "All",
        "status": "NEW",
        "keywords": [
          "perf",
          "perf:resource-use"
        ],
        "priority": "--",
        "severity": "S3",
        "id": 711924,
        "last_change_time": "2024-04-08T16:58:41Z",
        "component": "Graphics: WebRender",
        "creation_time": "2011-12-19T09:05:20Z"
      },
      {
        "creation_time": "2012-06-03T03:18:54Z",
        "component": "Graphics: Canvas2D",
        "id": 760888,
        "last_change_time": "2024-04-05T11:37:58Z",
        "severity": "S3",
        "keywords": [
          "perf"
        ],
        "priority": "--",
        "status": "NEW",
        "summary": "IE10 Test Drive: ParticleAcceleration Canvas 2D demo is slow",
        "op_sys": "All"
      },
      {
        "severity": "S3",
        "last_change_time": "2023-06-05T16:31:57Z",
        "id": 803709,
        "creation_time": "2012-10-19T21:25:22Z",
        "component": "Networking",
        "summary": "We appear to be copying large data URIs over and over in nsSimpleURI.",
        "op_sys": "All",
        "status": "NEW",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3"
      },
      {
        "severity": "S3",
        "creation_time": "2012-11-09T08:29:30Z",
        "component": "PDF Viewer",
        "id": 810214,
        "last_change_time": "2025-03-31T14:05:54Z",
        "summary": "Processing http://lib.tkk.fi/Dipl/2002/urn007413.pdf is slow, and its text layer is all messed up",
        "op_sys": "Linux",
        "status": "NEW",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P3"
      },
      {
        "last_change_time": "2023-03-01T12:04:23Z",
        "id": 821693,
        "component": "CSS Parsing and Computation",
        "creation_time": "2012-12-14T13:46:12Z",
        "severity": "S3",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "priority": "--",
        "status": "NEW",
        "summary": "janky Scrolling on smartsheet.com Sheets",
        "op_sys": "Windows 7"
      },
      {
        "op_sys": "Windows 7",
        "summary": "nsIconChannel::AsyncOpen can block",
        "keywords": [
          "perf"
        ],
        "priority": "--",
        "status": "NEW",
        "severity": "S3",
        "creation_time": "2013-01-07T19:06:03Z",
        "component": "Graphics: ImageLib",
        "id": 827440,
        "last_change_time": "2022-11-24T06:34:31Z"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf"
        ],
        "priority": "--",
        "op_sys": "Windows 8",
        "summary": "Opening huge mercurial long commit page freezing Firefox",
        "id": 827937,
        "last_change_time": "2022-10-29T12:12:42Z",
        "creation_time": "2013-01-08T19:17:33Z",
        "component": "Layout",
        "severity": "S3"
      },
      {
        "id": 830504,
        "last_change_time": "2024-08-20T19:28:43Z",
        "component": "SQLite and Embedded Database Bindings",
        "creation_time": "2013-01-14T22:07:19Z",
        "severity": "S3",
        "keywords": [
          "perf:frontend",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "status": "NEW",
        "summary": "Firefox should abort on tryserver when executing SQL on the main thread",
        "op_sys": "All"
      },
      {
        "component": "General",
        "creation_time": "2013-02-05T02:16:08Z",
        "id": 837989,
        "last_change_time": "2023-05-16T02:22:53Z",
        "severity": "S3",
        "keywords": [
          "main-thread-io",
          "perf:frontend"
        ],
        "priority": "--",
        "status": "NEW",
        "summary": "Use IOUtils for gLastOpenDirectory",
        "op_sys": "All"
      },
      {
        "op_sys": "macOS",
        "summary": "nsFileChannel::nsFileChannel causes expensive lstats",
        "keywords": [
          "main-thread-io",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "status": "NEW",
        "severity": "S3",
        "component": "Networking: File",
        "creation_time": "2013-04-16T15:29:21Z",
        "id": 862383,
        "last_change_time": "2024-03-27T16:10:09Z"
      },
      {
        "summary": "nsIOService::NewFileURI is doing main thread IO and causes jank",
        "op_sys": "All",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "main-thread-io",
          "perf",
          "perf:frontend"
        ],
        "severity": "S3",
        "last_change_time": "2024-04-01T16:26:36Z",
        "id": 890712,
        "creation_time": "2013-07-07T15:57:11Z",
        "component": "Networking"
      },
      {
        "keywords": [
          "perf"
        ],
        "priority": "--",
        "status": "NEW",
        "op_sys": "All",
        "summary": "Polygon.com page scrolling becomes extremely slow after a while",
        "id": 914595,
        "last_change_time": "2023-07-27T07:06:57Z",
        "creation_time": "2013-09-10T12:49:00Z",
        "component": "Layout",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "creation_time": "2013-09-17T02:34:03Z",
        "component": "General",
        "id": 917090,
        "last_change_time": "2022-10-11T01:07:35Z",
        "op_sys": "All",
        "summary": "Visibility state is not updated when the browser window is obscured or on another workspace",
        "status": "NEW",
        "priority": "--",
        "keywords": [
          "perf:resource-use"
        ]
      },
      {
        "summary": "Optimize GetRootPresContext() to avoid going through the viewmanager / view tree",
        "op_sys": "Linux",
        "priority": "--",
        "keywords": [
          "perf"
        ],
        "status": "NEW",
        "severity": "S3",
        "creation_time": "2014-03-18T00:14:52Z",
        "component": "Layout",
        "last_change_time": "2025-12-02T04:57:52Z",
        "id": 984690
      },
      {
        "severity": "S3",
        "creation_time": "2014-06-10T10:02:00Z",
        "component": "Toolbars and Customization",
        "last_change_time": "2023-07-19T04:52:40Z",
        "id": 1023152,
        "op_sys": "All",
        "summary": "Preload panel contents on hover of toolbar button",
        "status": "NEW",
        "priority": "--",
        "keywords": [
          "perf:frontend"
        ]
      },
      {
        "creation_time": "2014-08-02T09:50:40Z",
        "component": "Places",
        "id": 1047817,
        "last_change_time": "2025-03-11T07:09:11Z",
        "severity": "S3",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:frontend"
        ],
        "op_sys": "All",
        "summary": "Make bookmarks toolbar view use async openContainer"
      },
      {
        "creation_time": "2014-11-12T00:22:19Z",
        "component": "JavaScript Engine",
        "last_change_time": "2022-10-11T15:57:30Z",
        "id": 1097376,
        "severity": "S3",
        "keywords": [
          "perf"
        ],
        "priority": "--",
        "status": "NEW",
        "summary": "Poor performance in Ember app Discourse",
        "op_sys": "Android"
      },
      {
        "status": "NEW",
        "keywords": [
          "multiprocess",
          "perf",
          "perf:responsiveness",
          "testcase"
        ],
        "priority": "P5",
        "op_sys": "All",
        "summary": "[e10s] There is a delay for about 1 seconds to display <select> drop-down list with 1600+ items",
        "creation_time": "2015-01-06T01:55:10Z",
        "component": "Layout: Form Controls",
        "last_change_time": "2025-12-05T02:06:49Z",
        "id": 1118086,
        "severity": "S3"
      },
      {
        "id": 1154987,
        "last_change_time": "2023-10-11T11:00:04Z",
        "creation_time": "2015-04-15T23:32:29Z",
        "component": "JavaScript Engine",
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "meta",
          "perf"
        ],
        "priority": "--",
        "summary": "[Meta] Move JS parsing off of main thread and enable incremental parsing",
        "op_sys": "Windows 8.1"
      },
      {
        "status": "NEW",
        "priority": "--",
        "keywords": [
          "perf:animation",
          "perf:responsiveness",
          "reproducible"
        ],
        "summary": "Very laggy panning and zooming of map on Orbis website",
        "op_sys": "All",
        "id": 1155307,
        "last_change_time": "2024-04-02T23:00:44Z",
        "creation_time": "2015-04-16T18:22:07Z",
        "component": "Graphics: WebRender",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "id": 1162665,
        "last_change_time": "2025-03-12T05:36:53Z",
        "component": "JavaScript: GC",
        "creation_time": "2015-05-07T18:46:57Z",
        "op_sys": "Unspecified",
        "summary": "ES6 Map performance for large numbers of elements is deficient",
        "status": "NEW",
        "priority": "--",
        "keywords": []
      },
      {
        "op_sys": "Unspecified",
        "summary": "2D canvas+HTML/CSS animation demo site broken on Firefox, works great on Chrome",
        "status": "NEW",
        "priority": "--",
        "keywords": [
          "perf:responsiveness"
        ],
        "severity": "S3",
        "id": 1213513,
        "last_change_time": "2023-02-19T05:13:03Z",
        "component": "DOM: Animation",
        "creation_time": "2015-10-10T00:31:34Z"
      },
      {
        "creation_time": "2015-10-23T09:20:20Z",
        "component": "Layout",
        "last_change_time": "2024-09-22T12:08:26Z",
        "id": 1217748,
        "severity": "S3",
        "keywords": [],
        "priority": "--",
        "status": "NEW",
        "op_sys": "All",
        "summary": "On/Off opacity changes shouldn't create active layers"
      },
      {
        "severity": "S3",
        "component": "JavaScript Engine",
        "creation_time": "2015-11-05T17:44:28Z",
        "last_change_time": "2022-10-11T17:46:56Z",
        "id": 1222086,
        "summary": "Block JavaScript parser thread when source code characters are not available",
        "op_sys": "Unspecified",
        "priority": "--",
        "keywords": [
          "perf"
        ],
        "status": "NEW"
      },
      {
        "severity": "S3",
        "last_change_time": "2025-04-05T10:12:20Z",
        "id": 1246410,
        "creation_time": "2016-02-06T17:43:25Z",
        "component": "Graphics: CanvasWebGL",
        "summary": "Low performance of texImage2D with canvas2d and WebGL",
        "op_sys": "Unspecified",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf",
          "regression",
          "testcase"
        ]
      },
      {
        "status": "NEW",
        "priority": "--",
        "keywords": [
          "perf:responsiveness",
          "reproducible"
        ],
        "op_sys": "Unspecified",
        "summary": "Firefox hangs with 100% CPU usage when scrolling on specific page",
        "id": 1257910,
        "last_change_time": "2025-03-17T20:05:29Z",
        "component": "Graphics: WebRender",
        "creation_time": "2016-03-18T17:34:07Z",
        "severity": "S3"
      },
      {
        "last_change_time": "2022-10-11T18:13:31Z",
        "id": 1265980,
        "creation_time": "2016-04-20T07:12:37Z",
        "component": "JavaScript Engine",
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf"
        ],
        "priority": "--",
        "summary": "Running jasmine is slower than Safari and Chrome",
        "op_sys": "Unspecified"
      },
      {
        "op_sys": "Unspecified",
        "summary": "CanvasRenderingContext2D::DrawImage takes lots of  time when scrolling Google Spreadsheet",
        "status": "NEW",
        "priority": "--",
        "keywords": [
          "perf"
        ],
        "severity": "S3",
        "last_change_time": "2022-11-08T00:01:53Z",
        "id": 1278554,
        "component": "Graphics: Canvas2D",
        "creation_time": "2016-06-07T13:45:20Z"
      },
      {
        "severity": "S3",
        "creation_time": "2016-06-19T13:43:03Z",
        "component": "JavaScript: GC",
        "last_change_time": "2024-08-11T09:37:57Z",
        "id": 1280802,
        "summary": "Angular framework performance test spends 10% in nursery GC",
        "op_sys": "Unspecified",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf"
        ]
      },
      {
        "last_change_time": "2022-12-08T15:45:06Z",
        "id": 1283089,
        "creation_time": "2016-06-29T13:06:59Z",
        "component": "Graphics",
        "severity": "S3",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness",
          "regression"
        ],
        "status": "NEW",
        "op_sys": "Linux",
        "summary": "Firefox 40+ are very sluggish through x2go"
      },
      {
        "creation_time": "2016-08-12T05:51:58Z",
        "component": "Layout",
        "last_change_time": "2022-10-11T18:30:52Z",
        "id": 1294625,
        "severity": "S3",
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "Try to tick refresh driver during html parsing"
      },
      {
        "severity": "S3",
        "component": "Layout",
        "creation_time": "2016-08-18T03:04:45Z",
        "last_change_time": "2022-10-11T18:31:41Z",
        "id": 1296161,
        "op_sys": "Unspecified",
        "summary": "Measure and solve sync reflow for studying gdoc performance.",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf"
        ]
      },
      {
        "severity": "S3",
        "component": "Widget: Win32",
        "creation_time": "2016-10-01T23:51:50Z",
        "id": 1306925,
        "last_change_time": "2026-02-17T17:22:57Z",
        "summary": "If you set a high Polling Rate USB port of the mouse (1000 Hz), there will be noticeable performance issues while moving tabs",
        "op_sys": "Windows 7",
        "status": "NEW",
        "priority": "--",
        "keywords": [
          "perf"
        ]
      },
      {
        "summary": "[Perf] [google docs] Firefox will get 3~9% faster when running gdoc test cases with chrome user agent",
        "op_sys": "Linux",
        "status": "NEW",
        "priority": "--",
        "keywords": [
          "perf"
        ],
        "severity": "S3",
        "creation_time": "2016-10-03T03:00:35Z",
        "component": "General",
        "last_change_time": "2024-08-14T04:57:13Z",
        "id": 1307024
      },
      {
        "id": 1308660,
        "last_change_time": "2025-04-16T19:29:34Z",
        "creation_time": "2016-10-08T00:18:22Z",
        "component": "Layout",
        "severity": "--",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "priority": "--",
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "for background tabs, break refresh driver tick into multiple events off the main thread's event loop"
      },
      {
        "severity": "S3",
        "component": "JavaScript Engine",
        "creation_time": "2016-11-11T14:41:11Z",
        "last_change_time": "2022-10-11T18:44:06Z",
        "id": 1316864,
        "op_sys": "Windows 10",
        "summary": "Google Apps extremely slow -- scrolling, updating text, etc -- unusable",
        "status": "NEW",
        "keywords": [
          "perf"
        ],
        "priority": "P5"
      },
      {
        "id": 1320534,
        "last_change_time": "2025-03-11T08:30:57Z",
        "creation_time": "2016-11-27T11:13:21Z",
        "component": "Bookmarks & History",
        "severity": "--",
        "status": "NEW",
        "priority": "P5",
        "keywords": [
          "hang",
          "meta",
          "nightly-community",
          "perf:frontend"
        ],
        "op_sys": "All",
        "summary": "[meta] Speed and performance of importing bookmarks from JSON or HTML files is awful"
      },
      {
        "component": "Layout",
        "creation_time": "2017-01-11T03:23:20Z",
        "id": 1330187,
        "last_change_time": "2025-03-11T07:51:38Z",
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3",
        "op_sys": "Unspecified",
        "summary": "DisplayList building shows signs of poor CPU usage"
      },
      {
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "Explore using the presshell arena for FramePropertyTable",
        "last_change_time": "2022-10-11T18:55:13Z",
        "id": 1330558,
        "component": "Layout",
        "creation_time": "2017-01-12T08:37:41Z",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "creation_time": "2017-01-27T21:15:19Z",
        "component": "Graphics: Layers",
        "id": 1334655,
        "last_change_time": "2022-10-11T18:58:09Z",
        "op_sys": "Unspecified",
        "summary": "PCompositorBridge::Msg_WillClose can block the UI thread when closing a window",
        "priority": "P3",
        "keywords": [
          "hang",
          "perf"
        ],
        "status": "NEW"
      },
      {
        "component": "Graphics",
        "creation_time": "2017-02-22T22:05:51Z",
        "id": 1341882,
        "last_change_time": "2022-10-11T19:02:26Z",
        "severity": "S3",
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "status": "NEW",
        "summary": "Slow performance at drawing rectangles on Google Slides",
        "op_sys": "Unspecified"
      },
      {
        "severity": "S3",
        "creation_time": "2017-02-25T04:45:01Z",
        "component": "Networking: HTTP",
        "id": 1342632,
        "last_change_time": "2022-03-02T15:55:52Z",
        "summary": "Speed up PHttpChannelConstructor and consider streaming HttpChannelOpenArgs",
        "op_sys": "Unspecified",
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "status": "NEW"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "op_sys": "Unspecified",
        "summary": "nsIDOMWindowUtils::StartFrameTimeRecording should not use sync IPC",
        "last_change_time": "2022-10-11T19:03:23Z",
        "id": 1343383,
        "creation_time": "2017-02-28T23:07:56Z",
        "component": "Graphics: Layers",
        "severity": "S3"
      },
      {
        "priority": "--",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "Overpainting on Google docs",
        "component": "Web Painting",
        "creation_time": "2017-03-01T15:26:14Z",
        "id": 1343538,
        "last_change_time": "2024-11-22T02:22:00Z",
        "severity": "S3"
      },
      {
        "creation_time": "2017-03-10T12:17:59Z",
        "component": "JavaScript Engine: JIT",
        "id": 1346178,
        "last_change_time": "2025-04-30T01:31:39Z",
        "severity": "S3",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "summary": "Consider compiling Ion IC code less eagerly",
        "op_sys": "All"
      },
      {
        "severity": "S3",
        "component": "WebVR",
        "creation_time": "2017-03-13T20:32:12Z",
        "id": 1346927,
        "last_change_time": "2022-10-11T19:05:40Z",
        "op_sys": "Unspecified",
        "summary": "Replace PVRManager::GetSensorState with lock-free shared memory structure (Eliminating message queue IPC)",
        "keywords": [
          "perf"
        ],
        "priority": "--",
        "status": "NEW"
      },
      {
        "keywords": [
          "perf"
        ],
        "priority": "P5",
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "Consider storing hints during syntax parse",
        "id": 1347861,
        "last_change_time": "2022-10-11T19:06:12Z",
        "creation_time": "2017-03-16T09:28:24Z",
        "component": "JavaScript Engine",
        "severity": "S3"
      },
      {
        "priority": "--",
        "keywords": [
          "perf"
        ],
        "status": "NEW",
        "op_sys": "All",
        "summary": "Optimize away OverflowAreasProperty more often",
        "id": 1348697,
        "last_change_time": "2023-11-27T10:28:31Z",
        "component": "Layout",
        "creation_time": "2017-03-19T22:26:30Z",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "last_change_time": "2024-04-24T02:40:50Z",
        "id": 1349148,
        "creation_time": "2017-03-21T09:28:43Z",
        "component": "JavaScript Engine: JIT",
        "summary": "Improve performance of megamorphic stubs",
        "op_sys": "All",
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "status": "NEW"
      },
      {
        "summary": "Make service worker ScriptLoader paths use cached js bytecode from cache API",
        "op_sys": "Unspecified",
        "status": "NEW",
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "severity": "S3",
        "id": 1350367,
        "last_change_time": "2022-10-11T19:08:05Z",
        "component": "DOM: Service Workers",
        "creation_time": "2017-03-24T15:40:46Z"
      },
      {
        "keywords": [
          "perf:frontend"
        ],
        "priority": "--",
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "Avoid full session history collect for DOMTitleChanged/OnHistoryReload",
        "last_change_time": "2023-07-19T04:57:18Z",
        "id": 1350569,
        "creation_time": "2017-03-25T15:19:03Z",
        "component": "Session Restore",
        "severity": "S3"
      },
      {
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "summary": "Bad performance on Sony Horizon game page",
        "op_sys": "Unspecified",
        "last_change_time": "2022-10-11T19:08:17Z",
        "id": 1350618,
        "creation_time": "2017-03-25T21:49:47Z",
        "component": "Audio/Video: Playback",
        "severity": "S3"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf"
        ],
        "priority": "--",
        "op_sys": "Unspecified",
        "summary": "Add some instrumentation to find commonly added preference observers",
        "last_change_time": "2022-10-11T19:08:21Z",
        "id": 1350749,
        "creation_time": "2017-03-26T21:54:08Z",
        "component": "General",
        "severity": "S3"
      },
      {
        "priority": "--",
        "keywords": [
          "nightly-community",
          "perf",
          "perf:resource-use",
          "power"
        ],
        "status": "NEW",
        "summary": "Provide \"Slight/Light/Low power/Battery saving/Battery saver\" mode option",
        "op_sys": "All",
        "last_change_time": "2025-03-11T08:37:03Z",
        "id": 1351755,
        "creation_time": "2017-03-29T17:44:37Z",
        "component": "Performance: General",
        "severity": "--"
      },
      {
        "id": 1351789,
        "last_change_time": "2025-04-27T11:43:06Z",
        "component": "JavaScript: GC",
        "creation_time": "2017-03-29T18:30:44Z",
        "severity": "S3",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "summary": "Add Telemetry probes for measuring garbage volume per GC",
        "op_sys": "Unspecified"
      },
      {
        "op_sys": "All",
        "summary": "Consider faster alternatives to PLDHashTable in hot Layout code paths",
        "keywords": [
          "perf"
        ],
        "priority": "--",
        "status": "NEW",
        "severity": "S3",
        "component": "Layout",
        "creation_time": "2017-03-29T20:02:58Z",
        "last_change_time": "2022-10-11T19:09:06Z",
        "id": 1351829
      },
      {
        "op_sys": "All",
        "summary": "Consider adding StyleDisplay() values to nsIFrame",
        "status": "NEW",
        "priority": "--",
        "keywords": [
          "perf"
        ],
        "severity": "S3",
        "creation_time": "2017-03-29T20:09:00Z",
        "component": "Layout",
        "last_change_time": "2025-05-05T12:26:28Z",
        "id": 1351830
      },
      {
        "priority": "P2",
        "keywords": [
          "perf",
          "perf:resource-use"
        ],
        "status": "NEW",
        "summary": "Avoid running the refresh driver when the page is in background",
        "op_sys": "Unspecified",
        "creation_time": "2017-03-30T20:21:31Z",
        "component": "Layout",
        "last_change_time": "2022-11-02T13:08:34Z",
        "id": 1352205,
        "severity": "--"
      },
      {
        "summary": "[meta] Improve GC scheduling",
        "op_sys": "Unspecified",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "meta",
          "perf"
        ],
        "severity": "S3",
        "id": 1352524,
        "last_change_time": "2025-05-06T16:14:08Z",
        "creation_time": "2017-03-31T19:02:50Z",
        "component": "JavaScript: GC"
      },
      {
        "summary": "Optimize GetName TypeOfNoProperty",
        "op_sys": "All",
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "status": "NEW",
        "severity": "S3",
        "id": 1353384,
        "last_change_time": "2025-02-10T18:11:27Z",
        "component": "JavaScript Engine: JIT",
        "creation_time": "2017-04-04T14:54:51Z"
      },
      {
        "summary": "Initialize sandbox global properties lazily",
        "op_sys": "Unspecified",
        "status": "NEW",
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "severity": "S3",
        "last_change_time": "2022-10-11T19:11:14Z",
        "id": 1354945,
        "component": "XPConnect",
        "creation_time": "2017-04-09T22:09:43Z"
      },
      {
        "keywords": [
          "perf",
          "perf:frontend",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "Investigate preparing the next tab on mousedown on the tab close button",
        "id": 1355456,
        "last_change_time": "2023-07-19T04:59:14Z",
        "creation_time": "2017-04-11T13:02:53Z",
        "component": "Tabbed Browser",
        "severity": "S3"
      },
      {
        "component": "General",
        "creation_time": "2017-04-11T13:07:05Z",
        "last_change_time": "2023-05-16T02:22:12Z",
        "id": 1355459,
        "severity": "S3",
        "status": "NEW",
        "priority": "P4",
        "keywords": [
          "perf:frontend"
        ],
        "summary": "The last window and the task bar item should disappear immediately on shutdown",
        "op_sys": "Unspecified"
      },
      {
        "summary": "Activating the browser window is janky",
        "op_sys": "macOS",
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "status": "NEW",
        "severity": "S3",
        "creation_time": "2017-04-11T13:26:24Z",
        "component": "Widget: Cocoa",
        "id": 1355466,
        "last_change_time": "2022-10-11T19:11:35Z"
      },
      {
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:frontend",
          "perf:responsiveness"
        ],
        "op_sys": "Unspecified",
        "summary": "Try avoiding layout flushes in autocomplete::_handleOverflow",
        "last_change_time": "2024-03-22T08:25:52Z",
        "id": 1356532,
        "creation_time": "2017-04-14T09:29:21Z",
        "component": "Autocomplete",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "last_change_time": "2022-10-11T19:12:20Z",
        "id": 1356594,
        "component": "General",
        "creation_time": "2017-04-14T16:14:15Z",
        "op_sys": "Unspecified",
        "summary": "Rewrite AppConstants.jsm in C++",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3",
        "status": "NEW"
      },
      {
        "severity": "S3",
        "component": "Tours",
        "creation_time": "2017-04-19T11:50:56Z",
        "last_change_time": "2024-03-22T13:34:58Z",
        "id": 1357710,
        "summary": "Uninitializing UITour is expensive",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf:frontend",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "status": "NEW"
      },
      {
        "id": 1357810,
        "last_change_time": "2022-10-11T19:13:04Z",
        "creation_time": "2017-04-19T16:33:44Z",
        "component": "JavaScript: GC",
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf",
          "perf:responsiveness",
          "triage-deferred"
        ],
        "priority": "P3",
        "summary": "Investigate source of memory_pressure event in gecko, and whether to repurpose it",
        "op_sys": "Unspecified"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "op_sys": "Unspecified",
        "summary": "Pre-generate and cache the most common optimized Baseline IC stubs",
        "id": 1357884,
        "last_change_time": "2025-09-08T18:32:25Z",
        "component": "JavaScript Engine: JIT",
        "creation_time": "2017-04-19T20:51:47Z",
        "severity": "S3"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf",
          "perf:frontend",
          "perf:responsiveness"
        ],
        "priority": "P4",
        "summary": "1.24ms uninterruptible reflow at useLandscapeMode@chrome://devtools/content/inspector/inspector.js:460:27",
        "op_sys": "Unspecified",
        "creation_time": "2017-04-21T07:04:16Z",
        "component": "Inspector",
        "last_change_time": "2023-03-15T12:20:36Z",
        "id": 1358390,
        "severity": "S3"
      },
      {
        "severity": "S3",
        "creation_time": "2017-04-21T07:44:25Z",
        "component": "Menus",
        "id": 1358405,
        "last_change_time": "2023-07-19T05:12:10Z",
        "summary": "13.97ms uninterruptible reflow at getComputedURL@chrome://browser/content/nsContextMenu.js:979:15",
        "op_sys": "Unspecified",
        "priority": "P4",
        "keywords": [
          "perf",
          "perf:frontend"
        ],
        "status": "NEW"
      },
      {
        "status": "NEW",
        "priority": "P4",
        "keywords": [
          "perf"
        ],
        "summary": "2.41ms uninterruptible reflow at stop@chrome://global/content/bindings/browser.xml:99:13",
        "op_sys": "Unspecified",
        "last_change_time": "2022-10-11T19:13:38Z",
        "id": 1358730,
        "component": "Tabbed Browser",
        "creation_time": "2017-04-22T08:02:21Z",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "creation_time": "2017-04-22T08:20:27Z",
        "component": "Toolbars and Customization",
        "id": 1358734,
        "last_change_time": "2023-03-15T12:22:15Z",
        "op_sys": "Unspecified",
        "summary": "0.93ms uninterruptible reflow at showNavToolbox@chrome://browser/content/browser-fullScreenAndPointerLock.js:576:18",
        "priority": "P4",
        "keywords": [
          "perf",
          "perf:frontend",
          "perf:responsiveness"
        ],
        "status": "NEW"
      },
      {
        "severity": "S3",
        "id": 1358810,
        "last_change_time": "2022-10-11T19:13:41Z",
        "creation_time": "2017-04-22T20:35:28Z",
        "component": "General",
        "op_sys": "Unspecified",
        "summary": "0.91ms uninterruptible reflow at create@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/client/framework/toolbox-hosts.js:86:5",
        "status": "NEW",
        "keywords": [
          "perf"
        ],
        "priority": "P4"
      },
      {
        "creation_time": "2017-04-22T21:09:20Z",
        "component": "Tabbed Browser",
        "last_change_time": "2023-07-19T05:14:35Z",
        "id": 1358816,
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf",
          "perf:frontend",
          "stale-bug"
        ],
        "priority": "P3",
        "op_sys": "Unspecified",
        "summary": "0.92ms uninterruptible reflow at _animateTabMove@chrome://browser/content/tabbrowser.xml:6165:26"
      },
      {
        "severity": "S3",
        "creation_time": "2017-04-24T23:00:04Z",
        "component": "PopupNotifications and Notification Bars",
        "last_change_time": "2024-04-25T08:29:24Z",
        "id": 1359259,
        "summary": "0.92ms uninterruptible reflow at PopupNotifications_showPanel@resource://gre/modules/PopupNotifications.jsm:932:9",
        "op_sys": "Unspecified",
        "status": "NEW",
        "keywords": [
          "perf",
          "perf:frontend",
          "perf:responsiveness"
        ],
        "priority": "P4"
      },
      {
        "op_sys": "Unspecified",
        "summary": "2.17ms uninterruptible reflow at receiveMessage@resource://gre/modules/SelectParentHelper.jsm:214:7",
        "priority": "P4",
        "keywords": [
          "perf",
          "perf:frontend",
          "perf:responsiveness"
        ],
        "status": "NEW",
        "severity": "S3",
        "last_change_time": "2023-03-15T12:23:43Z",
        "id": 1359263,
        "creation_time": "2017-04-24T23:17:55Z",
        "component": "Layout: Form Controls"
      },
      {
        "op_sys": "Unspecified",
        "summary": "0.29ms uninterruptible reflow at _handleDOMChange@chrome://extensions/content/ext-browser-content.js:215:24",
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:frontend",
          "perf:responsiveness"
        ],
        "status": "NEW",
        "severity": "S3",
        "last_change_time": "2023-07-19T05:16:14Z",
        "id": 1359408,
        "component": "Frontend",
        "creation_time": "2017-04-25T13:40:22Z"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf",
          "perf:frontend",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "summary": "1.19ms uninterruptible reflow from window.innerWidth at getContentSize@resource://gre/modules/PageThumbUtils.jsm:112:9",
        "op_sys": "Unspecified",
        "component": "DOM: Core & HTML",
        "creation_time": "2017-05-03T06:10:08Z",
        "last_change_time": "2023-07-19T05:17:38Z",
        "id": 1361635,
        "severity": "S3"
      },
      {
        "op_sys": "Unspecified",
        "summary": "0.97ms uninterruptible reflow at @chrome://browser/content/tab-content.js:85:43",
        "status": "NEW",
        "keywords": [
          "perf",
          "perf:frontend"
        ],
        "priority": "P4",
        "severity": "S3",
        "id": 1362529,
        "last_change_time": "2024-04-03T03:05:43Z",
        "creation_time": "2017-05-05T19:49:58Z",
        "component": "Tabbed Browser"
      },
      {
        "severity": "S3",
        "creation_time": "2017-05-05T19:55:47Z",
        "component": "Bookmarks & History",
        "id": 1362533,
        "last_change_time": "2023-04-03T15:54:01Z",
        "op_sys": "Unspecified",
        "summary": "1.0ms uninterruptible reflow at PT__onDragOver@chrome://browser/content/places/browserPlacesViews.js:1600:11",
        "status": "NEW",
        "keywords": [
          "perf"
        ],
        "priority": "P3"
      },
      {
        "keywords": [
          "meta",
          "perf"
        ],
        "priority": "--",
        "status": "NEW",
        "summary": "[meta] YouTube first video play is slow",
        "op_sys": "Windows 10",
        "component": "General",
        "creation_time": "2017-05-09T12:57:23Z",
        "last_change_time": "2025-12-08T11:18:09Z",
        "id": 1363354,
        "severity": "S3"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "summary": "Facebook profile navigation start: access the user photo profile from a post",
        "op_sys": "Windows 10",
        "component": "JavaScript Engine",
        "creation_time": "2017-05-09T14:58:20Z",
        "id": 1363403,
        "last_change_time": "2022-10-11T19:16:52Z",
        "severity": "S3"
      },
      {
        "summary": "1.89ms uninterruptible reflow at insertPlaceholder@resource://app/modules/DragPositionManager.jsm:181:7",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf:frontend"
        ],
        "priority": "P4",
        "status": "NEW",
        "severity": "S3",
        "creation_time": "2017-05-12T03:27:15Z",
        "component": "Toolbars and Customization",
        "id": 1364290,
        "last_change_time": "2023-03-15T12:35:29Z"
      },
      {
        "summary": "0.98ms uninterruptible reflow at AreaPositionManager@resource://app/modules/DragPositionManager.jsm:24:23",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf:frontend"
        ],
        "priority": "P4",
        "status": "NEW",
        "severity": "S3",
        "component": "Toolbars and Customization",
        "creation_time": "2017-05-12T06:07:30Z",
        "id": 1364324,
        "last_change_time": "2023-07-19T05:19:37Z"
      },
      {
        "id": 1364861,
        "last_change_time": "2022-10-11T19:17:54Z",
        "component": "DOM: Core & HTML",
        "creation_time": "2017-05-15T11:15:05Z",
        "severity": "S3",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "summary": "Setting innerHTML slower than in Safari",
        "op_sys": "All"
      },
      {
        "severity": "S3",
        "last_change_time": "2024-03-22T08:08:02Z",
        "id": 1365305,
        "component": "Tabbed Browser",
        "creation_time": "2017-05-16T16:23:18Z",
        "summary": "0.86ms uninterruptible reflow at _positionPinnedTabs@chrome://browser/content/tabbrowser.xml:6147:33",
        "op_sys": "Unspecified",
        "status": "NEW",
        "priority": "P5",
        "keywords": [
          "perf",
          "perf:frontend",
          "perf:responsiveness"
        ]
      },
      {
        "severity": "S3",
        "id": 1365835,
        "last_change_time": "2023-02-15T13:39:49Z",
        "creation_time": "2017-05-18T04:36:30Z",
        "component": "JavaScript Engine",
        "summary": "Lots of time spent in createScriptForLazilyInterpretedFunction() when playing a youtube video",
        "op_sys": "Unspecified",
        "keywords": [
          "perf"
        ],
        "priority": "P5",
        "status": "NEW"
      },
      {
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "[Input Latency] Firefox is 63% (35 ms) slower than Chrome in case Facebook - click right arrow on photo viewer",
        "creation_time": "2017-05-24T10:07:36Z",
        "component": "Graphics",
        "last_change_time": "2022-10-11T19:19:28Z",
        "id": 1367352,
        "severity": "S3"
      },
      {
        "status": "NEW",
        "priority": "P4",
        "keywords": [
          "perf"
        ],
        "summary": "Investigate sweeping atoms table concurrently",
        "op_sys": "Unspecified",
        "creation_time": "2017-05-30T16:58:29Z",
        "component": "JavaScript: GC",
        "last_change_time": "2022-10-11T19:20:24Z",
        "id": 1368761,
        "severity": "S3"
      },
      {
        "last_change_time": "2022-10-11T19:21:09Z",
        "id": 1370181,
        "component": "JavaScript: GC",
        "creation_time": "2017-06-05T09:45:53Z",
        "severity": "S3",
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "status": "NEW",
        "summary": "Don't start possibly-long-running GC work when there's not much time left in the budget",
        "op_sys": "Unspecified"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Components.manager.addBootstrappedManifestLocation() can do main thread IO at startup",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:startup"
        ],
        "severity": "S3",
        "id": 1370658,
        "last_change_time": "2023-05-31T19:42:07Z",
        "component": "Add-ons Manager",
        "creation_time": "2017-06-06T20:27:46Z"
      },
      {
        "last_change_time": "2022-10-11T19:22:19Z",
        "id": 1371646,
        "component": "Layout",
        "creation_time": "2017-06-09T13:21:26Z",
        "severity": "S3",
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "status": "NEW",
        "summary": "Amazon access book result navigation profile",
        "op_sys": "Windows 10"
      },
      {
        "id": 1371661,
        "last_change_time": "2022-10-11T19:22:22Z",
        "component": "JavaScript: GC",
        "creation_time": "2017-06-09T14:05:55Z",
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "summary": "Google image search profile",
        "op_sys": "Windows 10"
      },
      {
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "status": "NEW",
        "summary": "Don't block on beforeunload events from third-party tracking domain scripts",
        "op_sys": "Unspecified",
        "last_change_time": "2022-10-11T19:24:13Z",
        "id": 1373694,
        "component": "DOM: Events",
        "creation_time": "2017-06-16T15:07:57Z",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "last_change_time": "2024-09-22T12:02:07Z",
        "id": 1373773,
        "component": "Graphics: Layers",
        "creation_time": "2017-06-16T18:42:39Z",
        "op_sys": "All",
        "summary": "PCompositorBridge::Msg_NotifyChildCreated sync IPC when opening tabs",
        "status": "NEW",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "priority": "P3"
      },
      {
        "severity": "S3",
        "creation_time": "2017-06-19T17:47:13Z",
        "component": "Session Restore",
        "id": 1374354,
        "last_change_time": "2022-10-11T19:24:47Z",
        "op_sys": "Unspecified",
        "summary": "SessionRestore slows down page loading of a new tab",
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "status": "NEW"
      },
      {
        "id": 1375022,
        "last_change_time": "2022-10-11T19:25:13Z",
        "creation_time": "2017-06-21T13:35:54Z",
        "component": "DOM: Copy & Paste and Drag & Drop",
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf"
        ],
        "priority": "P2",
        "op_sys": "Unspecified",
        "summary": "Consider removing the Msg_GetClipboard sync IPC"
      },
      {
        "severity": "S3",
        "id": 1375565,
        "last_change_time": "2024-08-20T13:10:44Z",
        "creation_time": "2017-06-22T16:41:42Z",
        "component": "JavaScript: GC",
        "summary": "GC: Do nursery allocation for external strings",
        "op_sys": "Unspecified",
        "status": "NEW",
        "priority": "P2",
        "keywords": [
          "perf"
        ]
      },
      {
        "id": 1376557,
        "last_change_time": "2022-10-11T19:26:18Z",
        "creation_time": "2017-06-27T20:35:41Z",
        "component": "JavaScript: GC",
        "severity": "S3",
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "finalisation slice can run late"
      },
      {
        "component": "Web Painting",
        "creation_time": "2017-06-29T23:00:47Z",
        "id": 1377316,
        "last_change_time": "2022-10-11T19:26:50Z",
        "severity": "S3",
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "status": "NEW",
        "op_sys": "All",
        "summary": "mozilla::DisplayItemData::AssertDisplayItemData is slow"
      },
      {
        "severity": "N/A",
        "creation_time": "2017-07-01T21:06:40Z",
        "component": "JavaScript Engine",
        "last_change_time": "2024-06-04T16:41:00Z",
        "id": 1377710,
        "summary": "Compiling lots of unused branches can be expensive",
        "op_sys": "Unspecified",
        "keywords": [
          "perf"
        ],
        "priority": "P5",
        "status": "NEW"
      },
      {
        "severity": "S3",
        "creation_time": "2017-07-07T20:33:05Z",
        "component": "Layout: Form Controls",
        "last_change_time": "2024-09-08T13:06:36Z",
        "id": 1379275,
        "summary": "Selectboxes/dropdowns in servicenow are laggy/difficult to use when dom.forms.select.customstyling is enabled",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf:responsiveness",
          "testcase-wanted"
        ],
        "priority": "P3",
        "status": "NEW"
      },
      {
        "id": 1380314,
        "last_change_time": "2024-04-03T03:05:47Z",
        "component": "Find Backend",
        "creation_time": "2017-07-12T13:25:59Z",
        "severity": "S3",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:frontend"
        ],
        "op_sys": "Unspecified",
        "summary": "'Find Again' is slow"
      },
      {
        "severity": "S3",
        "id": 1380773,
        "last_change_time": "2022-10-11T19:29:11Z",
        "creation_time": "2017-07-13T19:25:32Z",
        "component": "JavaScript: GC",
        "op_sys": "All",
        "summary": "Consider adding large tenured promotion counts to MinorGC marker",
        "keywords": [
          "perf"
        ],
        "priority": "P5",
        "status": "NEW"
      },
      {
        "severity": "S3",
        "creation_time": "2017-07-17T05:56:16Z",
        "component": "General",
        "id": 1381384,
        "last_change_time": "2022-10-11T19:29:33Z",
        "summary": "Performance analysis on gmail_ail_compose_new_mail_via_keyboard",
        "op_sys": "Windows 10",
        "priority": "P2",
        "keywords": [
          "perf"
        ],
        "status": "NEW"
      },
      {
        "op_sys": "Unspecified",
        "summary": "ABP causes us to spend 5x more time in selector matching on obama wikipedia page",
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "status": "NEW",
        "severity": "S3",
        "last_change_time": "2022-10-11T19:30:08Z",
        "id": 1382319,
        "component": "CSS Parsing and Computation",
        "creation_time": "2017-07-19T18:18:32Z"
      },
      {
        "last_change_time": "2022-10-11T19:31:34Z",
        "id": 1384727,
        "creation_time": "2017-07-26T21:25:26Z",
        "component": "XPCOM",
        "severity": "S3",
        "keywords": [],
        "priority": "--",
        "status": "NEW",
        "summary": "Make QueryInterface use integer IDs",
        "op_sys": "Unspecified"
      },
      {
        "severity": "S3",
        "component": "JavaScript: Standard Library",
        "creation_time": "2017-07-27T12:12:16Z",
        "id": 1384900,
        "last_change_time": "2022-11-29T02:34:29Z",
        "summary": "Array.prototype.sort is slow on very sparse arrays",
        "op_sys": "Unspecified",
        "status": "NEW",
        "keywords": [
          "perf"
        ],
        "priority": "P3"
      },
      {
        "severity": "S3",
        "component": "Session Restore",
        "creation_time": "2017-08-01T11:50:53Z",
        "id": 1386206,
        "last_change_time": "2024-12-07T01:07:36Z",
        "summary": "Breaking FormData's collect loop into chunks to be executed in idle dispatch",
        "op_sys": "Unspecified",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:frontend",
          "perf:responsiveness"
        ]
      },
      {
        "summary": "Suppress window animation for New Window",
        "op_sys": "All",
        "status": "NEW",
        "keywords": [
          "perf:animation",
          "perf:responsiveness"
        ],
        "priority": "P4",
        "severity": "S3",
        "component": "General",
        "creation_time": "2017-08-03T17:32:57Z",
        "last_change_time": "2024-04-03T15:55:42Z",
        "id": 1387142
      },
      {
        "severity": "S3",
        "component": "General",
        "creation_time": "2017-08-08T07:48:04Z",
        "last_change_time": "2022-10-11T19:33:53Z",
        "id": 1388263,
        "op_sys": "Unspecified",
        "summary": "Suspend the taskbar refresh in WindowsJumpLists.jsm when computer becomes idle",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf"
        ]
      },
      {
        "summary": "Restoring sessions with multiple windows is very slow",
        "op_sys": "Unspecified",
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:frontend",
          "perf:startup"
        ],
        "status": "NEW",
        "severity": "S3",
        "id": 1388758,
        "last_change_time": "2023-07-13T11:51:52Z",
        "component": "Session Restore",
        "creation_time": "2017-08-09T14:58:43Z"
      },
      {
        "id": 1391282,
        "last_change_time": "2024-03-22T08:01:19Z",
        "creation_time": "2017-08-17T15:36:13Z",
        "component": "Toolbars and Customization",
        "severity": "S3",
        "priority": "P5",
        "keywords": [
          "perf:frontend"
        ],
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "The menu panel is painted several times when it's opened for the first time"
      },
      {
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "summary": "Nightly 36% slower than Chrome on Mozilla Log Analyzer",
        "op_sys": "Unspecified",
        "last_change_time": "2024-05-08T17:30:15Z",
        "id": 1391710,
        "creation_time": "2017-08-18T17:52:24Z",
        "component": "JavaScript Engine",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "component": "JavaScript Engine",
        "creation_time": "2017-08-25T08:54:48Z",
        "id": 1393712,
        "last_change_time": "2024-04-30T16:49:52Z",
        "op_sys": "Unspecified",
        "summary": "for-await-of with Async Generator is slow",
        "keywords": [
          "perf"
        ],
        "priority": "P2",
        "status": "NEW"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Hasal input latency case facebook_ail_scroll_home_1_txt regressed median from 22ms to 44ms on 7/29",
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "status": "NEW",
        "severity": "S3",
        "id": 1394761,
        "last_change_time": "2022-10-11T19:38:20Z",
        "component": "JavaScript Engine",
        "creation_time": "2017-08-29T10:16:17Z"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf",
          "perf:frontend",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "op_sys": "Unspecified",
        "summary": "Breaking tab data collection into chunks",
        "component": "Session Restore",
        "creation_time": "2017-08-30T07:34:42Z",
        "last_change_time": "2023-07-19T05:30:13Z",
        "id": 1395066,
        "severity": "S3"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "op_sys": "Unspecified",
        "summary": "Scripted modification of the selection can jank the browser",
        "creation_time": "2017-08-30T18:27:24Z",
        "component": "DOM: Selection",
        "id": 1395274,
        "last_change_time": "2024-08-11T05:57:26Z",
        "severity": "S3"
      },
      {
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "status": "NEW",
        "summary": "Investigate whether we can remove the browser-element-api:call JS sync IPC",
        "op_sys": "Unspecified",
        "last_change_time": "2022-10-11T19:39:00Z",
        "id": 1395813,
        "component": "DOM: Core & HTML",
        "creation_time": "2017-09-01T04:22:34Z",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "component": "Application Update",
        "creation_time": "2017-09-06T20:56:43Z",
        "last_change_time": "2022-10-11T19:40:26Z",
        "id": 1397450,
        "summary": "Eliminate or at least lessen main thread IO in UpdateService.jsm",
        "op_sys": "Unspecified",
        "status": "NEW",
        "keywords": [
          "perf",
          "perf:responsiveness",
          "perf:startup"
        ],
        "priority": "P3"
      },
      {
        "summary": "Investigate code early initializing the Places Connection on startup",
        "op_sys": "Unspecified",
        "keywords": [
          "perf:frontend",
          "perf:startup"
        ],
        "priority": "P3",
        "status": "NEW",
        "severity": "S3",
        "creation_time": "2017-09-19T15:02:46Z",
        "component": "Places",
        "id": 1401214,
        "last_change_time": "2025-03-11T07:52:37Z"
      },
      {
        "summary": "Loading HR4909 (Defense Authorization Act) takes a very long time and causes content process to hang",
        "op_sys": "Unspecified",
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "status": "NEW",
        "severity": "S3",
        "component": "XSLT",
        "creation_time": "2017-09-19T20:52:23Z",
        "last_change_time": "2022-10-11T19:43:25Z",
        "id": 1401345
      },
      {
        "summary": "When clicking \"show sidebars\", resulting in not smooth page content shifting then resizing",
        "op_sys": "Unspecified",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:frontend"
        ],
        "severity": "S3",
        "creation_time": "2017-09-22T20:13:23Z",
        "component": "General",
        "id": 1402458,
        "last_change_time": "2023-09-21T15:51:04Z"
      },
      {
        "id": 1402844,
        "last_change_time": "2023-06-09T09:33:52Z",
        "creation_time": "2017-09-25T13:29:27Z",
        "component": "Graphics",
        "severity": "S3",
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:responsiveness",
          "reproducible"
        ],
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "Janky scrolling on CXC2017 website"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3",
        "summary": "High CPU on twitch TV stream",
        "op_sys": "Windows 10",
        "creation_time": "2017-09-28T05:26:40Z",
        "component": "Audio/Video: Playback",
        "last_change_time": "2024-05-06T04:45:30Z",
        "id": 1403823,
        "severity": "S3"
      },
      {
        "severity": "S3",
        "component": "JavaScript Engine",
        "creation_time": "2017-10-02T15:46:14Z",
        "last_change_time": "2025-11-24T20:18:39Z",
        "id": 1404950,
        "op_sys": "Unspecified",
        "summary": "new Promise(resolve => {}) is a performance footgun",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf"
        ]
      },
      {
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "Spike in memory use when navigating away from a page that uses a lot of memory",
        "id": 1414938,
        "last_change_time": "2022-10-11T19:55:20Z",
        "component": "XPCOM",
        "creation_time": "2017-11-06T20:13:20Z",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "creation_time": "2017-11-14T21:39:14Z",
        "component": "General",
        "id": 1417221,
        "last_change_time": "2024-04-03T15:59:35Z",
        "summary": "Prevent background thumbnails from causing high CPU usage",
        "op_sys": "Unspecified",
        "status": "NEW",
        "keywords": [
          "perf",
          "perf:resource-use",
          "power"
        ],
        "priority": "P3"
      },
      {
        "summary": "Make recascading when only custom properties change cheaper",
        "op_sys": "Unspecified",
        "status": "NEW",
        "priority": "P3",
        "keywords": [],
        "severity": "S3",
        "last_change_time": "2024-10-31T10:09:27Z",
        "id": 1417970,
        "creation_time": "2017-11-16T16:16:12Z",
        "component": "CSS Parsing and Computation"
      },
      {
        "priority": "P3",
        "keywords": [
          "meta",
          "perf"
        ],
        "status": "NEW",
        "summary": "[meta] Firefox's disk write behaviour is worse than other browsers' in some situations",
        "op_sys": "Unspecified",
        "last_change_time": "2025-03-11T07:59:07Z",
        "id": 1419053,
        "component": "General",
        "creation_time": "2017-11-20T16:23:31Z",
        "severity": "N/A"
      },
      {
        "id": 1420369,
        "last_change_time": "2022-10-11T20:00:41Z",
        "component": "CSS Parsing and Computation",
        "creation_time": "2017-11-24T09:21:58Z",
        "severity": "S3",
        "status": "NEW",
        "priority": "P2",
        "keywords": [
          "perf",
          "regression"
        ],
        "summary": "stylo: 6.21 - 6.54% remote-tsvg  / remote-twitter  (android-6-0-armv8-api16, android-7-1-armv8-api16) regression on push db56323cd08f4883e4824199b441a3141be655e5 (Thu Nov 23 2017)",
        "op_sys": "Android"
      },
      {
        "severity": "S3",
        "component": "JavaScript Engine",
        "creation_time": "2017-11-24T15:37:41Z",
        "last_change_time": "2025-11-27T09:08:19Z",
        "id": 1420440,
        "op_sys": "All",
        "summary": "Optimize the Function constructor",
        "status": "NEW",
        "keywords": [],
        "priority": "P3"
      },
      {
        "keywords": [
          "perf:frontend"
        ],
        "priority": "P5",
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "The reload button should not be temporarily disabled when loading about:home in a new window",
        "component": "Toolbars and Customization",
        "creation_time": "2017-11-28T23:04:36Z",
        "last_change_time": "2023-07-19T05:33:33Z",
        "id": 1421463,
        "severity": "S3"
      },
      {
        "severity": "S3",
        "component": "Places",
        "creation_time": "2017-11-29T09:34:26Z",
        "id": 1421562,
        "last_change_time": "2025-03-11T08:34:22Z",
        "summary": "Reduce the amount of I/O done by Places [meta]",
        "op_sys": "Unspecified",
        "priority": "P5",
        "keywords": [
          "meta"
        ],
        "status": "NEW"
      },
      {
        "priority": "P2",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW",
        "summary": "console.log of an object graph in a worker is very slow",
        "op_sys": "Unspecified",
        "last_change_time": "2022-10-11T21:05:35Z",
        "id": 1424740,
        "component": "DOM: Core & HTML",
        "creation_time": "2017-12-11T16:41:25Z",
        "severity": "S3"
      },
      {
        "id": 1425040,
        "last_change_time": "2024-01-21T08:23:41Z",
        "creation_time": "2017-12-13T15:50:00Z",
        "component": "CSS Parsing and Computation",
        "severity": "S3",
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "status": "NEW",
        "summary": "Firefox is very slow entering/leaving Twitter “lightbox” effects when the DOM is large",
        "op_sys": "Linux"
      },
      {
        "severity": "S3",
        "component": "General",
        "creation_time": "2017-12-13T17:13:45Z",
        "last_change_time": "2024-04-02T13:24:28Z",
        "id": 1425083,
        "op_sys": "Unspecified",
        "summary": "Gather Telemetry on synchronous reflows caused by browser UI on pre-release builds",
        "status": "NEW",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P3"
      },
      {
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "status": "NEW",
        "op_sys": "All",
        "summary": "Jupyter Lab very slow in Firefox, with rapid long flex reflows (triggered from JS .offsetTop calls)",
        "id": 1425106,
        "last_change_time": "2022-10-11T21:06:00Z",
        "component": "Layout: Flexbox",
        "creation_time": "2017-12-13T19:34:54Z",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "component": "Layout",
        "creation_time": "2017-12-20T18:29:56Z",
        "id": 1426447,
        "last_change_time": "2022-10-11T21:07:16Z",
        "summary": "Avoid refresh driver ticks in windows that aren't ready for first paint yet",
        "op_sys": "Unspecified",
        "status": "NEW",
        "keywords": [],
        "priority": "P3"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Consider firing ViewShowing events before moving the \"panelview\" node",
        "keywords": [
          "perf:frontend",
          "perf:responsiveness"
        ],
        "priority": "P5",
        "status": "NEW",
        "severity": "S3",
        "creation_time": "2018-01-22T14:34:52Z",
        "component": "Toolbars and Customization",
        "last_change_time": "2023-03-23T22:16:39Z",
        "id": 1432169
      },
      {
        "op_sys": "Unspecified",
        "summary": "pdf with many images uses a lot of memory on scrolling",
        "keywords": [
          "memory-footprint",
          "perf",
          "perf:resource-use"
        ],
        "priority": "P3",
        "status": "NEW",
        "severity": "S4",
        "component": "PDF Viewer",
        "creation_time": "2018-02-08T15:00:42Z",
        "last_change_time": "2025-09-06T04:47:06Z",
        "id": 1436734
      },
      {
        "id": 1437914,
        "last_change_time": "2022-10-11T21:16:53Z",
        "creation_time": "2018-02-13T16:04:33Z",
        "component": "DOM: Editor",
        "severity": "S3",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "summary": "Typing 25-30 chars on an input with expensive regexp pattern causes browser to hang",
        "op_sys": "Unspecified"
      },
      {
        "id": 1438989,
        "last_change_time": "2023-05-22T15:41:24Z",
        "component": "Places",
        "creation_time": "2018-02-16T21:07:53Z",
        "severity": "S3",
        "keywords": [
          "perf",
          "perf:frontend",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "status": "NEW",
        "summary": "Allow to cancel page-icon fetches if the menu requesting them closes, or give those events a lower priority",
        "op_sys": "Unspecified"
      },
      {
        "priority": "P3",
        "keywords": [
          "memory-footprint"
        ],
        "status": "NEW",
        "op_sys": "Linux",
        "summary": "Linux: Evaluate only using fontconfig in the parent process",
        "last_change_time": "2023-02-28T16:07:16Z",
        "id": 1439412,
        "creation_time": "2018-02-19T18:36:54Z",
        "component": "Graphics: Text",
        "severity": "S3"
      },
      {
        "creation_time": "2018-03-08T05:32:23Z",
        "component": "JavaScript: GC",
        "id": 1444013,
        "last_change_time": "2022-10-11T21:21:53Z",
        "severity": "S3",
        "status": "NEW",
        "keywords": [],
        "priority": "P3",
        "op_sys": "Unspecified",
        "summary": "The collector should yield after nursery collection if the budget is exceeded"
      },
      {
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:frontend",
          "perf:responsiveness"
        ],
        "summary": "When closing a tab, select the next tab at the same time as the closed tab disappears",
        "op_sys": "Unspecified",
        "creation_time": "2018-03-12T13:42:53Z",
        "component": "Tabbed Browser",
        "id": 1444886,
        "last_change_time": "2023-03-23T15:16:51Z",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "component": "PDF Viewer",
        "creation_time": "2018-03-14T19:14:46Z",
        "id": 1445735,
        "last_change_time": "2024-05-02T16:10:42Z",
        "op_sys": "All",
        "summary": "Unable to render specific PDF file.",
        "priority": "P3",
        "keywords": [
          "testcase"
        ],
        "status": "NEW"
      },
      {
        "id": 1445811,
        "last_change_time": "2025-01-10T06:27:13Z",
        "creation_time": "2018-03-14T23:04:19Z",
        "component": "DOM: UI Events & Focus Handling",
        "severity": "S3",
        "status": "NEW",
        "priority": "P2",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "op_sys": "Unspecified",
        "summary": "Consider avoiding synchronously focusing elements as it triggers sync style flush"
      },
      {
        "summary": "Avoid alternating between the appstarting and the normal cursor before first paint",
        "op_sys": "Windows",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:startup"
        ],
        "severity": "S3",
        "last_change_time": "2023-07-19T05:37:16Z",
        "id": 1447288,
        "component": "General",
        "creation_time": "2018-03-20T13:04:05Z"
      },
      {
        "severity": "S3",
        "component": "Web Painting",
        "creation_time": "2018-03-22T19:54:49Z",
        "id": 1448130,
        "last_change_time": "2022-10-11T21:25:18Z",
        "op_sys": "Unspecified",
        "summary": "Overpainting (full-area paint flashing) in browser UI (toolbars, devtools, sidebars) when resizing window",
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "status": "NEW"
      },
      {
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:startup"
        ],
        "summary": "Firefox launcher is blocked in slow DNS queries for local hostname",
        "op_sys": "Unspecified",
        "creation_time": "2018-03-26T08:23:28Z",
        "component": "Startup and Profile System",
        "last_change_time": "2024-05-02T16:13:02Z",
        "id": 1448783,
        "severity": "S3"
      },
      {
        "op_sys": "Unspecified",
        "summary": "The early blank window should use the about:home background color",
        "keywords": [
          "perf:frontend",
          "perf:startup",
          "regression"
        ],
        "priority": "P2",
        "status": "NEW",
        "severity": "S4",
        "component": "General",
        "creation_time": "2018-04-02T05:43:30Z",
        "last_change_time": "2023-03-23T15:16:04Z",
        "id": 1450626
      },
      {
        "op_sys": "Unspecified",
        "summary": "nsLoginManager does main thread IO to query storage when the login list is shown",
        "status": "NEW",
        "keywords": [
          "perf:frontend",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "severity": "S3",
        "id": 1451375,
        "last_change_time": "2023-07-19T05:38:43Z",
        "component": "Password Manager",
        "creation_time": "2018-04-04T15:45:59Z"
      },
      {
        "component": "Tabbed Browser",
        "creation_time": "2018-04-04T16:42:23Z",
        "last_change_time": "2024-03-22T07:54:18Z",
        "id": 1451401,
        "severity": "S3",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:frontend"
        ],
        "op_sys": "Unspecified",
        "summary": "Opening a new tab and then causing a Switch To tab from the AwesomeBar always results in a short spinner"
      },
      {
        "severity": "S3",
        "last_change_time": "2023-03-23T22:14:53Z",
        "id": 1452388,
        "creation_time": "2018-04-07T15:03:22Z",
        "component": "New Tab Page",
        "summary": "PageThumbs spends an appreciable amount of time on the main thread",
        "op_sys": "Unspecified",
        "keywords": [
          "perf:frontend",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "status": "NEW"
      },
      {
        "summary": "[Form Autofill] Parsing Roll20 character sheet for phone numbers leads to janks",
        "op_sys": "Unspecified",
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "status": "NEW",
        "severity": "S3",
        "last_change_time": "2022-10-11T21:29:23Z",
        "id": 1453351,
        "component": "Form Autofill",
        "creation_time": "2018-04-11T14:48:36Z"
      },
      {
        "severity": "S3",
        "creation_time": "2018-04-18T18:06:07Z",
        "component": "Tabbed Browser",
        "last_change_time": "2023-07-19T05:40:16Z",
        "id": 1455058,
        "summary": "Short spinner reported when tearing tabs out of a window",
        "op_sys": "Unspecified",
        "keywords": [
          "perf:frontend"
        ],
        "priority": "P3",
        "status": "NEW"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "summary": "Scrolling is a bit janky in card mode at reddit (post-redesign), with long waits mid-refresh-driver-tick between \"reflow\" & \"display list\"",
        "op_sys": "Unspecified",
        "creation_time": "2018-04-18T20:57:48Z",
        "component": "Web Painting",
        "last_change_time": "2025-03-11T07:19:41Z",
        "id": 1455118,
        "severity": "S3"
      },
      {
        "severity": "S3",
        "last_change_time": "2022-10-11T21:31:49Z",
        "id": 1456581,
        "component": "Layout: Text and Fonts",
        "creation_time": "2018-04-24T18:08:51Z",
        "summary": "Gmail Sent folder locks up browser for minutes",
        "op_sys": "Windows 10",
        "priority": "P3",
        "keywords": [],
        "status": "NEW"
      },
      {
        "summary": "Window title in the taskbar changes multiple times when restoring session",
        "op_sys": "Windows 10",
        "priority": "P3",
        "keywords": [
          "perf:frontend"
        ],
        "status": "NEW",
        "severity": "S3",
        "id": 1458894,
        "last_change_time": "2022-10-17T16:29:23Z",
        "component": "Session Restore",
        "creation_time": "2018-05-03T13:59:33Z"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Nested grid/flex layout is slow in mobile UI at http://www.wikia.com/fandom",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "severity": "S3",
        "last_change_time": "2022-10-11T21:38:53Z",
        "id": 1465205,
        "component": "Layout",
        "creation_time": "2018-05-29T20:06:59Z"
      },
      {
        "creation_time": "2018-06-04T22:41:15Z",
        "component": "Layout: Text and Fonts",
        "id": 1466704,
        "last_change_time": "2024-10-29T01:54:38Z",
        "severity": "S3",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "summary": "trying to View Source on twitter.com stalls out entire content process (spending lots of time in nsBidiPresUtils::TraverseFrames->nsBidiPresUtils::ResolveParagraph->SplitInlineAncestors)",
        "op_sys": "All"
      },
      {
        "creation_time": "2018-06-05T19:30:25Z",
        "component": "CSS Parsing and Computation",
        "id": 1466922,
        "last_change_time": "2023-02-14T17:24:45Z",
        "severity": "S3",
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "status": "NEW",
        "summary": "Styling jank (134ms style flush) when loading new Reddit layout",
        "op_sys": "Unspecified"
      },
      {
        "creation_time": "2018-06-18T19:50:53Z",
        "component": "JavaScript Engine: JIT",
        "last_change_time": "2025-11-27T21:26:20Z",
        "id": 1469383,
        "severity": "S3",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "op_sys": "Unspecified",
        "summary": "Duplicate stub attachment for GetProp in browser tests"
      },
      {
        "severity": "S3",
        "id": 1469947,
        "last_change_time": "2022-10-11T21:42:39Z",
        "creation_time": "2018-06-20T18:01:54Z",
        "component": "Web Painting",
        "summary": "Infinite painting on https://material.io/design/ (background image has animated SVG, but covered up by other stuff)",
        "op_sys": "Unspecified",
        "priority": "P2",
        "keywords": [],
        "status": "NEW"
      },
      {
        "last_change_time": "2022-10-11T21:46:37Z",
        "id": 1475020,
        "component": "Layout",
        "creation_time": "2018-07-11T20:02:04Z",
        "severity": "S3",
        "status": "NEW",
        "priority": "P3",
        "keywords": [],
        "summary": "Slow reflows at cnn.com slideshow, with lots of time spent in nested grid reflow",
        "op_sys": "Unspecified"
      },
      {
        "summary": "Reduce duplication and unify responsibility for window sizing",
        "op_sys": "Unspecified",
        "priority": "P3",
        "keywords": [],
        "status": "NEW",
        "severity": "S3",
        "creation_time": "2018-07-18T19:39:19Z",
        "component": "General",
        "last_change_time": "2022-10-11T21:47:53Z",
        "id": 1476748
      },
      {
        "last_change_time": "2022-10-11T21:47:59Z",
        "id": 1476857,
        "creation_time": "2018-07-19T04:35:10Z",
        "component": "General",
        "severity": "S3",
        "status": "NEW",
        "priority": "P3",
        "keywords": [],
        "summary": "2048game.com has worse performance in Firefox as compared to Chrome browser",
        "op_sys": "Unspecified"
      },
      {
        "severity": "S3",
        "id": 1477235,
        "last_change_time": "2024-04-16T17:04:29Z",
        "creation_time": "2018-07-20T12:36:35Z",
        "component": "UI Widgets",
        "summary": "Reduce reflows in autocomplete binding (adjustHeight and potentially handleOverflow?)",
        "op_sys": "Unspecified",
        "priority": "P5",
        "keywords": [
          "perf:frontend",
          "perf:responsiveness"
        ],
        "status": "NEW"
      },
      {
        "severity": "S3",
        "last_change_time": "2023-09-21T15:50:25Z",
        "id": 1478703,
        "creation_time": "2018-07-26T15:28:37Z",
        "component": "Tabbed Browser",
        "summary": "Proactively warm up layers for the next (and previous?) tab when user presses ctrl (Win/Lin) or cmd (Mac)",
        "op_sys": "Unspecified",
        "priority": "P5",
        "keywords": [
          "perf:frontend",
          "perf:responsiveness"
        ],
        "status": "NEW"
      },
      {
        "creation_time": "2018-07-27T19:25:12Z",
        "component": "Toolbars and Customization",
        "last_change_time": "2024-03-22T07:54:48Z",
        "id": 1479083,
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf",
          "perf:frontend"
        ],
        "priority": "P3",
        "summary": "URL bar seems to trigger multiple layouts when browser window is resized at certain sizes",
        "op_sys": "Unspecified"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Lots of paints during tab switch",
        "status": "NEW",
        "keywords": [
          "perf:resource-use",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "severity": "S3",
        "id": 1482264,
        "last_change_time": "2024-04-02T13:25:37Z",
        "creation_time": "2018-08-09T21:29:48Z",
        "component": "DOM: Content Processes"
      },
      {
        "id": 1482654,
        "last_change_time": "2024-04-03T03:06:04Z",
        "component": "Tabbed Browser",
        "creation_time": "2018-08-11T16:33:53Z",
        "severity": "S3",
        "priority": "P3",
        "keywords": [
          "perf:frontend"
        ],
        "status": "NEW",
        "op_sys": "All",
        "summary": "1.43ms uninterruptible reflow at onxblunderflow@chrome://browser/content/tabbrowser.xml:47:11"
      },
      {
        "severity": "S3",
        "id": 1482670,
        "last_change_time": "2023-09-21T15:50:18Z",
        "creation_time": "2018-08-11T23:21:57Z",
        "component": "Tours",
        "summary": "1.38ms uninterruptible reflow at recreatePopup@resource:///modules/UITour.jsm:1443:5",
        "op_sys": "Linux",
        "status": "NEW",
        "keywords": [
          "perf:frontend",
          "perf:responsiveness"
        ],
        "priority": "P3"
      },
      {
        "keywords": [
          "perf:frontend",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "status": "NEW",
        "summary": "2.32ms uninterruptible reflow at showHighlightElement@resource:///modules/UITour.jsm:1046:24",
        "op_sys": "Linux",
        "id": 1482671,
        "last_change_time": "2024-04-03T17:59:14Z",
        "component": "Tours",
        "creation_time": "2018-08-11T23:22:41Z",
        "severity": "S3"
      },
      {
        "last_change_time": "2024-03-21T11:37:04Z",
        "id": 1482734,
        "component": "Tabbed Browser",
        "creation_time": "2018-08-12T20:37:09Z",
        "severity": "S3",
        "status": "NEW",
        "priority": "P5",
        "keywords": [
          "perf:frontend",
          "perf:responsiveness"
        ],
        "op_sys": "Linux",
        "summary": "2.09ms uninterruptible reflow at onxbldragover@chrome://browser/content/tabbrowser.xml:1391:9"
      },
      {
        "creation_time": "2018-08-14T15:44:10Z",
        "component": "Toolbars and Customization",
        "id": 1483268,
        "last_change_time": "2024-04-02T13:31:31Z",
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P3",
        "op_sys": "Linux",
        "summary": "1.17ms uninterruptible reflow at showTooltip@chrome://browser/content/browser.js:4539:5"
      },
      {
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "op_sys": "Linux",
        "summary": "1.05ms uninterruptible reflow at openPopup/this._openPopupPromise<@resource:///modules/PanelMultiView.jsm:518:9",
        "creation_time": "2018-08-30T04:44:58Z",
        "component": "Menus",
        "last_change_time": "2024-03-21T11:33:28Z",
        "id": 1487303,
        "severity": "S3"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf:frontend",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "op_sys": "Linux",
        "summary": "4.13ms uninterruptible reflow at openContextMenu@chrome://browser/content/nsContextMenu.js:80:3",
        "last_change_time": "2023-09-21T16:04:43Z",
        "id": 1487822,
        "creation_time": "2018-08-31T16:55:30Z",
        "component": "Menus",
        "severity": "S3"
      },
      {
        "last_change_time": "2025-07-09T16:27:46Z",
        "id": 1487906,
        "creation_time": "2018-08-31T22:04:45Z",
        "component": "Netmonitor",
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "meta",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "summary": "[meta] Network panel recording overhead",
        "op_sys": "Unspecified"
      },
      {
        "keywords": [],
        "priority": "P3",
        "status": "NEW",
        "summary": "Make StringBuilder::ToString look for characters to escape in each text node and attribute value only once",
        "op_sys": "Unspecified",
        "component": "DOM: Core & HTML",
        "creation_time": "2018-09-06T07:10:04Z",
        "id": 1489036,
        "last_change_time": "2023-03-17T05:38:28Z",
        "severity": "S3"
      },
      {
        "creation_time": "2018-09-10T19:32:52Z",
        "component": "Tabbed Browser",
        "last_change_time": "2024-04-03T03:06:13Z",
        "id": 1490095,
        "severity": "S3",
        "priority": "P3",
        "keywords": [
          "perf:frontend"
        ],
        "status": "NEW",
        "op_sys": "All",
        "summary": "Put <browser> elements from closed <tab>'s into a queue to be destroyed during idle time"
      },
      {
        "severity": "S3",
        "creation_time": "2018-09-11T22:44:34Z",
        "component": "DOM: Animation",
        "last_change_time": "2022-10-11T21:58:39Z",
        "id": 1490510,
        "summary": "400ms browser jank after transition between normal and full-screen video",
        "op_sys": "Unspecified",
        "status": "NEW",
        "keywords": [
          "perf",
          "regression"
        ],
        "priority": "P3"
      },
      {
        "severity": "S3",
        "component": "CSS Parsing and Computation",
        "creation_time": "2018-09-13T19:47:37Z",
        "last_change_time": "2022-10-11T21:59:09Z",
        "id": 1491111,
        "summary": "Slow restyles when loading cnn.com in network panel",
        "op_sys": "Unspecified",
        "priority": "P3",
        "keywords": [],
        "status": "NEW"
      },
      {
        "op_sys": "Windows 10",
        "summary": "GitHub PDF render is about 6x slower in Firefox compared to Chrome or Edge",
        "status": "NEW",
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "severity": "S3",
        "creation_time": "2018-09-21T16:39:05Z",
        "component": "Graphics",
        "last_change_time": "2022-10-11T22:00:55Z",
        "id": 1493218
      },
      {
        "id": 1493603,
        "last_change_time": "2022-10-11T22:01:16Z",
        "component": "DOM: Navigation",
        "creation_time": "2018-09-24T09:24:50Z",
        "severity": "S3",
        "keywords": [],
        "priority": "P3",
        "status": "NEW",
        "summary": "External loads needlessly force creating an about:blank content viewer with confusing (wrong?) unload semantics",
        "op_sys": "Unspecified"
      },
      {
        "severity": "S3",
        "creation_time": "2018-09-24T09:46:35Z",
        "component": "General",
        "last_change_time": "2023-09-21T16:05:15Z",
        "id": 1493609,
        "summary": "We're sometimes creating an about:blank document in the sidebar browser when the window opens",
        "op_sys": "Unspecified",
        "priority": "P2",
        "keywords": [
          "perf:resource-use",
          "perf:responsiveness"
        ],
        "status": "NEW"
      },
      {
        "keywords": [],
        "priority": "P3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "window.open creates an initial about:blank window twice",
        "id": 1493643,
        "last_change_time": "2024-02-27T18:22:03Z",
        "creation_time": "2018-09-24T11:50:13Z",
        "component": "General",
        "severity": "S3"
      },
      {
        "last_change_time": "2024-03-21T11:31:28Z",
        "id": 1493751,
        "creation_time": "2018-09-24T17:36:46Z",
        "component": "Graphics: Layers",
        "severity": "S3",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "summary": "Handle case when compositor receives layers but MozLayerTreeReady will not be serviced by the parent in time",
        "op_sys": "Unspecified"
      },
      {
        "id": 1494623,
        "last_change_time": "2022-10-11T22:02:17Z",
        "component": "Graphics: Canvas2D",
        "creation_time": "2018-09-27T11:13:44Z",
        "severity": "S3",
        "status": "NEW",
        "priority": "P3",
        "keywords": [],
        "summary": "www.google.com - Doodle stutters while playing when using Direct2D canvas",
        "op_sys": "Windows 10"
      },
      {
        "last_change_time": "2024-04-02T13:32:39Z",
        "id": 1496235,
        "component": "New Tab Page",
        "creation_time": "2018-10-03T21:36:27Z",
        "severity": "S3",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:resource-use",
          "perf:responsiveness"
        ],
        "summary": "Call browser.deprioritize() on the preloaded browser after it has been created",
        "op_sys": "Unspecified"
      },
      {
        "summary": "MediaDecoder threads can contend on the allocator lock too much",
        "op_sys": "All",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "severity": "--",
        "id": 1496554,
        "last_change_time": "2025-03-06T17:33:57Z",
        "creation_time": "2018-10-04T19:47:18Z",
        "component": "Audio/Video: Playback"
      },
      {
        "status": "NEW",
        "keywords": [],
        "priority": "P3",
        "summary": "Investigate if back/forward/reload from UI could interrupt JS",
        "op_sys": "Unspecified",
        "creation_time": "2018-10-09T19:23:46Z",
        "component": "DOM: Navigation",
        "id": 1497626,
        "last_change_time": "2022-10-11T22:04:38Z",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "component": "Web Painting",
        "creation_time": "2018-10-12T03:41:50Z",
        "id": 1498459,
        "last_change_time": "2022-10-11T22:05:24Z",
        "summary": "Twitter spends a lot of time building display lists.",
        "op_sys": "Unspecified",
        "priority": "P2",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW"
      },
      {
        "op_sys": "Unspecified",
        "summary": "5+ second delay before first paint, when loading 27mb plaintext log file",
        "keywords": [],
        "priority": "P3",
        "status": "NEW",
        "severity": "S3",
        "creation_time": "2018-10-23T19:39:44Z",
        "component": "Layout: Text and Fonts",
        "id": 1501415,
        "last_change_time": "2022-10-11T22:07:54Z"
      },
      {
        "severity": "S3",
        "last_change_time": "2022-10-11T22:09:15Z",
        "id": 1503119,
        "creation_time": "2018-10-30T04:56:35Z",
        "component": "DOM: CSS Object Model",
        "op_sys": "Unspecified",
        "summary": "A lot of time spent in query_selector",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:pageload"
        ]
      },
      {
        "last_change_time": "2025-03-21T02:42:42Z",
        "id": 1503371,
        "component": "Performance: Navigation",
        "creation_time": "2018-10-30T19:11:27Z",
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf:pageload"
        ],
        "priority": "P3",
        "summary": "Large local files with many pictures load extremely slow",
        "op_sys": "Unspecified"
      },
      {
        "op_sys": "Linux",
        "summary": "Firefox significantly impacted by high CPU load compared to other browsers / programs",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW",
        "severity": "S3",
        "component": "Performance: Responsiveness",
        "creation_time": "2018-11-01T11:06:02Z",
        "id": 1503830,
        "last_change_time": "2025-03-21T01:02:55Z"
      },
      {
        "keywords": [
          "main-thread-io",
          "perf:frontend"
        ],
        "priority": "--",
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "Crash report fetching from about:support, and probably about:crashes, is slow due to main thread IO",
        "component": "Crash Reporting",
        "creation_time": "2018-11-07T19:21:08Z",
        "last_change_time": "2024-03-20T19:58:34Z",
        "id": 1505531,
        "severity": "S3"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P3",
        "summary": "Investigate moving about:support to the (privileged?) child process",
        "op_sys": "Unspecified",
        "id": 1505537,
        "last_change_time": "2024-04-02T13:35:26Z",
        "creation_time": "2018-11-07T19:49:51Z",
        "component": "General",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "last_change_time": "2024-06-28T12:13:06Z",
        "id": 1505572,
        "creation_time": "2018-11-07T21:05:14Z",
        "component": "Session Restore",
        "op_sys": "Unspecified",
        "summary": "get*State should return an object instead of a serialized string",
        "status": "NEW",
        "keywords": [
          "perf:resource-use",
          "perf:responsiveness"
        ],
        "priority": "P2"
      },
      {
        "creation_time": "2018-11-10T06:34:37Z",
        "component": "Tabbed Browser",
        "id": 1506331,
        "last_change_time": "2022-10-11T22:12:13Z",
        "severity": "S3",
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:resource-use",
          "regression"
        ],
        "status": "NEW",
        "op_sys": "All",
        "summary": "High CPU utilization when rapidly hovering over tabs"
      },
      {
        "keywords": [],
        "priority": "P3",
        "status": "NEW",
        "op_sys": "All",
        "summary": "incrementally decode base64 data urls",
        "last_change_time": "2024-04-23T15:24:50Z",
        "id": 1512973,
        "creation_time": "2018-12-10T14:19:24Z",
        "component": "Networking",
        "severity": "S3"
      },
      {
        "last_change_time": "2025-04-27T11:32:05Z",
        "id": 1514113,
        "component": "JavaScript Engine: JIT",
        "creation_time": "2018-12-14T04:27:08Z",
        "severity": "S3",
        "status": "NEW",
        "keywords": [],
        "priority": "P3",
        "op_sys": "Unspecified",
        "summary": "Move ReprotectRegion and mprotect off the main thread"
      },
      {
        "summary": "Avoid putting the URL in the tab title when loading an about: page",
        "op_sys": "All",
        "status": "NEW",
        "keywords": [
          "perf",
          "perf:animation"
        ],
        "priority": "P3",
        "severity": "S3",
        "component": "Tabbed Browser",
        "creation_time": "2018-12-18T10:06:12Z",
        "last_change_time": "2024-04-03T16:01:42Z",
        "id": 1515003
      },
      {
        "creation_time": "2018-12-20T21:51:35Z",
        "component": "DOM: Device Interfaces",
        "last_change_time": "2023-06-14T21:23:08Z",
        "id": 1515780,
        "severity": "S3",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "op_sys": "Unspecified",
        "summary": "Consider more aggressively throttling deviceorientation events"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P2",
        "summary": "Coalesce wheel events at the refresh driver level instead of at the IPC boundary",
        "op_sys": "All",
        "creation_time": "2019-01-03T16:17:03Z",
        "component": "DOM: UI Events & Focus Handling",
        "last_change_time": "2023-04-21T08:06:42Z",
        "id": 1517509,
        "severity": "S3"
      },
      {
        "component": "JavaScript Engine: JIT",
        "creation_time": "2019-01-03T17:49:57Z",
        "last_change_time": "2024-10-09T00:52:22Z",
        "id": 1517534,
        "severity": "N/A",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "summary": "Poor performance of simple \"vector\" operations on arrays",
        "op_sys": "Unspecified"
      },
      {
        "summary": "Skeletal Animation: Slow (FPS) on Firefox compare to Chrome",
        "op_sys": "Linux",
        "status": "NEW",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "priority": "P2",
        "severity": "S3",
        "component": "JavaScript Engine: JIT",
        "creation_time": "2019-01-05T04:24:31Z",
        "last_change_time": "2024-09-04T04:33:43Z",
        "id": 1517916
      },
      {
        "severity": "S3",
        "id": 1518857,
        "last_change_time": "2022-10-11T22:22:44Z",
        "creation_time": "2019-01-09T18:01:15Z",
        "component": "JavaScript Engine: JIT",
        "summary": "provide optimized implementations of float modulus",
        "op_sys": "All",
        "priority": "P2",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P3",
        "op_sys": "Unspecified",
        "summary": "Can spend a really long time hanging the main thread in the parent process running gfxMacFontFamily::FindStyleVariations",
        "id": 1519513,
        "last_change_time": "2022-10-11T22:23:16Z",
        "creation_time": "2019-01-11T20:20:17Z",
        "component": "Layout: Text and Fonts",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "last_change_time": "2022-10-11T22:24:19Z",
        "id": 1520932,
        "creation_time": "2019-01-17T21:53:02Z",
        "component": "General",
        "summary": "Spurious Choreographer vsync messages when running tests",
        "op_sys": "Android",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3",
        "status": "NEW"
      },
      {
        "severity": "S3",
        "last_change_time": "2022-10-11T22:25:12Z",
        "id": 1521839,
        "creation_time": "2019-01-22T18:04:05Z",
        "component": "DOM: Content Processes",
        "op_sys": "Unspecified",
        "summary": "Try launching privileged content process asynchronously as soon as possible after main process start",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:startup"
        ]
      },
      {
        "creation_time": "2019-01-23T22:50:33Z",
        "component": "Performance: Responsiveness",
        "id": 1522311,
        "last_change_time": "2025-11-07T07:19:46Z",
        "severity": "S3",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW",
        "summary": "On Android, scrolling m.imgur.com displays blank frames for long periods of time and shows images with a delay",
        "op_sys": "All"
      },
      {
        "severity": "S3",
        "creation_time": "2019-01-30T23:31:28Z",
        "component": "DOM: Content Processes",
        "id": 1524104,
        "last_change_time": "2022-10-11T22:26:54Z",
        "summary": "Consider lowering priority for offscreen iFrame processes in foreground tabs",
        "op_sys": "Unspecified",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:resource-use"
        ]
      },
      {
        "status": "NEW",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "summary": "RSA Encrypt is VERY SLOW in firefox",
        "op_sys": "Linux",
        "last_change_time": "2022-03-02T16:28:52Z",
        "id": 1525260,
        "component": "JavaScript Engine: JIT",
        "creation_time": "2019-02-05T12:33:39Z",
        "severity": "S4"
      },
      {
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "[ARM64] Sometimes very laggy tab switching",
        "component": "Graphics",
        "creation_time": "2019-02-08T20:55:27Z",
        "id": 1526487,
        "last_change_time": "2022-10-11T22:28:37Z",
        "severity": "S3"
      },
      {
        "op_sys": "Unspecified",
        "summary": "nsAnonTempFileRemover::RemoveAnonTempFileFiles does main thread I/O off a timer",
        "keywords": [
          "main-thread-io",
          "perf",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "status": "NEW",
        "severity": "S3",
        "last_change_time": "2023-09-21T18:03:29Z",
        "id": 1529283,
        "component": "XPCOM",
        "creation_time": "2019-02-20T15:16:38Z"
      },
      {
        "priority": "P2",
        "keywords": [
          "memory-footprint",
          "perf:frontend",
          "perf:resource-use"
        ],
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "New tab page instances use more memory than new browser.xhtml instances and they shouldn't",
        "id": 1529309,
        "last_change_time": "2025-11-26T11:06:09Z",
        "creation_time": "2019-02-20T16:39:34Z",
        "component": "New Tab Page",
        "severity": "S3"
      },
      {
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "status": "NEW",
        "summary": "JavaScript algebra calculation on FireFox is slower than on Chrome",
        "op_sys": "Unspecified",
        "id": 1529343,
        "last_change_time": "2024-10-24T17:10:00Z",
        "creation_time": "2019-02-20T18:26:23Z",
        "component": "JavaScript Engine: JIT",
        "severity": "S4"
      },
      {
        "severity": "S3",
        "last_change_time": "2024-04-02T13:40:30Z",
        "id": 1530478,
        "component": "Pocket",
        "creation_time": "2019-02-25T20:07:37Z",
        "op_sys": "Unspecified",
        "summary": "SaveToPocket.jsm is initialized before first paint",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness",
          "perf:startup"
        ]
      },
      {
        "summary": "Convert more parts of browser_startup.js to an allow list",
        "op_sys": "Unspecified",
        "keywords": [
          "perf:startup"
        ],
        "priority": "P3",
        "status": "NEW",
        "severity": "S3",
        "last_change_time": "2023-06-13T14:42:13Z",
        "id": 1530479,
        "component": "General",
        "creation_time": "2019-02-25T20:11:37Z"
      },
      {
        "severity": "S3",
        "last_change_time": "2023-03-15T09:37:24Z",
        "id": 1531123,
        "component": "Networking",
        "creation_time": "2019-02-27T20:26:43Z",
        "op_sys": "Unspecified",
        "summary": "Upload speed is very slow in comparison to the expected. Works fine with both Chrome and Explorer.",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW"
      },
      {
        "summary": "[arm64-windows] Idle battery consumption on imgur is almost 2x higher than Edge",
        "op_sys": "Windows 10",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3",
        "status": "NEW",
        "severity": "S3",
        "component": "Performance: General",
        "creation_time": "2019-03-03T00:49:36Z",
        "id": 1532115,
        "last_change_time": "2022-10-11T22:33:30Z"
      },
      {
        "severity": "S3",
        "id": 1532720,
        "last_change_time": "2022-10-11T22:34:04Z",
        "creation_time": "2019-03-05T17:46:01Z",
        "component": "Graphics",
        "op_sys": "macOS",
        "summary": "Speakerdeck expensive paints for switching slides",
        "status": "NEW",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "priority": "P3"
      },
      {
        "id": 1533771,
        "last_change_time": "2023-09-21T16:12:08Z",
        "creation_time": "2019-03-08T15:55:39Z",
        "component": "Settings UI",
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf:frontend",
          "perf:resource-use"
        ],
        "priority": "P1",
        "summary": "Preferences always initialize all the panes through findInPage.js initialization",
        "op_sys": "Unspecified"
      },
      {
        "severity": "S3",
        "creation_time": "2019-03-12T18:35:26Z",
        "component": "Networking: Cookies",
        "last_change_time": "2024-05-02T16:16:21Z",
        "id": 1534745,
        "op_sys": "Unspecified",
        "summary": "cookies.sqlite is read on the main thread before first paint",
        "keywords": [
          "perf:startup",
          "reproducible"
        ],
        "priority": "P3",
        "status": "NEW"
      },
      {
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW",
        "summary": "nsLayoutUtils::DisplayRootHasRetainedDisplayListBuilder is slow",
        "op_sys": "Unspecified",
        "creation_time": "2019-03-13T20:36:32Z",
        "component": "Web Painting",
        "id": 1535134,
        "last_change_time": "2025-03-11T07:22:15Z",
        "severity": "S3"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3",
        "op_sys": "Unspecified",
        "summary": "Experiment with setting thread affinity in worker threads",
        "last_change_time": "2024-05-16T09:06:48Z",
        "id": 1535381,
        "component": "Performance: General",
        "creation_time": "2019-03-14T17:24:19Z",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "component": "JavaScript: GC",
        "creation_time": "2019-03-21T03:31:10Z",
        "id": 1537652,
        "last_change_time": "2022-10-11T22:38:00Z",
        "op_sys": "Unspecified",
        "summary": "Investigate more selective compacting GC.",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3",
        "status": "NEW"
      },
      {
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "Schedule nursery GC and slices around requestAnimationFrame",
        "creation_time": "2019-03-22T00:38:10Z",
        "component": "JavaScript: GC",
        "last_change_time": "2022-10-11T22:38:22Z",
        "id": 1538053,
        "severity": "S3"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Investigate performance impact of tuning the number of SSL Cert threads on low-end hardware",
        "keywords": [
          "perf:pageload"
        ],
        "priority": "P3",
        "status": "NEW",
        "severity": "S3",
        "last_change_time": "2025-03-21T02:42:35Z",
        "id": 1540683,
        "creation_time": "2019-04-01T12:08:05Z",
        "component": "Performance: Navigation"
      },
      {
        "id": 1540812,
        "last_change_time": "2022-10-11T22:40:58Z",
        "creation_time": "2019-04-01T18:41:02Z",
        "component": "DOM: Core & HTML",
        "severity": "S3",
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "status": "NEW",
        "summary": "document.lastModified for local XML documents shouldn't cause main thread IO",
        "op_sys": "Unspecified"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Consider using idle task for preloaded new tab browsers created when opening new tabs",
        "priority": "P3",
        "keywords": [
          "perf:frontend",
          "perf:resource-use",
          "perf:responsiveness"
        ],
        "status": "NEW",
        "severity": "S3",
        "last_change_time": "2023-09-21T16:13:59Z",
        "id": 1540832,
        "component": "Tabbed Browser",
        "creation_time": "2019-04-01T20:10:50Z"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf:startup"
        ],
        "priority": "P3",
        "op_sys": "Windows",
        "summary": "SandboxBroker is eagerly stat'ing various directories during start-up before opening the first window",
        "component": "Security: Process Sandboxing",
        "creation_time": "2019-04-02T22:12:12Z",
        "last_change_time": "2022-10-11T22:41:24Z",
        "id": 1541246,
        "severity": "S3"
      },
      {
        "last_change_time": "2022-10-11T22:41:45Z",
        "id": 1541575,
        "component": "Startup and Profile System",
        "creation_time": "2019-04-03T20:33:26Z",
        "severity": "S3",
        "keywords": [
          "perf:startup"
        ],
        "priority": "P3",
        "status": "NEW",
        "summary": "Ensure we're properly prefetching OSX shared libs with ReadAheadLib",
        "op_sys": "macOS"
      },
      {
        "component": "Widget: Win32",
        "creation_time": "2019-04-03T21:15:34Z",
        "last_change_time": "2022-05-02T16:01:17Z",
        "id": 1541593,
        "severity": "S3",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "main-thread-io",
          "perf",
          "perf:startup"
        ],
        "summary": "Windows: Reduce querying for volume information",
        "op_sys": "Unspecified"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf:frontend"
        ],
        "priority": "P2",
        "op_sys": "Unspecified",
        "summary": "FxA toolbar icon flicker on browser startup",
        "last_change_time": "2024-04-03T03:06:46Z",
        "id": 1542031,
        "creation_time": "2019-04-04T20:03:31Z",
        "component": "Firefox Accounts",
        "severity": "S3"
      },
      {
        "component": "General",
        "creation_time": "2019-04-09T06:36:28Z",
        "id": 1542995,
        "last_change_time": "2022-10-11T22:43:01Z",
        "severity": "S3",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW",
        "summary": "Thousands of window.onload events creates high memory/CPU until it crashes",
        "op_sys": "All"
      },
      {
        "summary": "Stop reading all files in both $app/defaults/prefs/*.js *and* $app/defaults/preferences/*.js",
        "op_sys": "Unspecified",
        "status": "NEW",
        "keywords": [
          "main-thread-io",
          "perf:startup"
        ],
        "priority": "P5",
        "severity": "S3",
        "creation_time": "2019-04-11T16:33:10Z",
        "component": "Preferences: Backend",
        "last_change_time": "2022-10-11T22:43:42Z",
        "id": 1543746
      },
      {
        "op_sys": "Unspecified",
        "summary": "Stop reading user.js from the profile to modify default prefs unless prefs.js opts in to doing so",
        "status": "NEW",
        "priority": "P5",
        "keywords": [
          "main-thread-io",
          "perf",
          "perf:startup"
        ],
        "severity": "S3",
        "component": "Preferences: Backend",
        "creation_time": "2019-04-11T16:46:23Z",
        "last_change_time": "2025-10-01T05:22:09Z",
        "id": 1543752
      },
      {
        "keywords": [
          "main-thread-io",
          "perf",
          "perf:startup"
        ],
        "priority": "--",
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "Investigate optimizing IO for script cache file access",
        "component": "XPCOM",
        "creation_time": "2019-04-12T15:22:51Z",
        "last_change_time": "2024-04-03T17:56:46Z",
        "id": 1544034,
        "severity": "S3"
      },
      {
        "severity": "S3",
        "creation_time": "2019-04-18T20:38:24Z",
        "component": "Graphics: WebRender",
        "id": 1545578,
        "last_change_time": "2022-10-11T22:45:30Z",
        "op_sys": "Android",
        "summary": "Investigate loading early libraries with RTLD_DEEPBIND for WebRender talos wins",
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "status": "NEW"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Make AddonManager startup less expensive in a brand new profile or after an update",
        "priority": "P3",
        "keywords": [
          "perf:frontend",
          "perf:startup"
        ],
        "status": "NEW",
        "severity": "S3",
        "component": "Add-ons Manager",
        "creation_time": "2019-04-25T23:15:34Z",
        "last_change_time": "2023-06-15T03:02:27Z",
        "id": 1547139
      },
      {
        "keywords": [
          "main-thread-io",
          "perf:responsiveness"
        ],
        "priority": "--",
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "Consider introducing a NS_CloseInBackground(PRFileDesc*) function",
        "last_change_time": "2023-06-15T18:42:19Z",
        "id": 1554667,
        "creation_time": "2019-05-27T13:33:20Z",
        "component": "XPCOM",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "id": 1555522,
        "last_change_time": "2024-08-14T04:41:55Z",
        "component": "JavaScript Engine",
        "creation_time": "2019-05-29T22:35:11Z",
        "summary": "Enable JavaScript Startup Bytecode Cache for DevTools code",
        "op_sys": "Unspecified",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P2",
        "status": "NEW"
      },
      {
        "keywords": [
          "perf:frontend",
          "regression"
        ],
        "priority": "P2",
        "status": "NEW",
        "summary": "Reduce TouchBar NSImage creation",
        "op_sys": "Unspecified",
        "last_change_time": "2024-04-03T03:06:48Z",
        "id": 1556688,
        "creation_time": "2019-06-04T10:18:59Z",
        "component": "Widget: Cocoa",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "id": 1559438,
        "last_change_time": "2022-10-11T22:58:24Z",
        "component": "CSS Parsing and Computation",
        "creation_time": "2019-06-14T16:28:15Z",
        "summary": "Switching to \"Tags\" in Reply by Buffer hangs the process (slow querySelectorAll)",
        "op_sys": "Unspecified",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW"
      },
      {
        "status": "NEW",
        "priority": "P5",
        "keywords": [
          "hang",
          "nightly-community",
          "perf",
          "perf:frontend",
          "reproducible"
        ],
        "op_sys": "Windows 7",
        "summary": "Deleting large amount of bookmarks and folders hangs/locks/freezes Mozilla Firefox completely for some time",
        "id": 1562490,
        "last_change_time": "2025-03-11T08:35:07Z",
        "component": "Bookmarks & History",
        "creation_time": "2019-06-30T18:47:03Z",
        "severity": "S3"
      },
      {
        "status": "NEW",
        "keywords": [],
        "priority": "P2",
        "summary": "High CPU usage in parent process main thread when loading tripadvisor.ca, for over 700ms",
        "op_sys": "macOS",
        "last_change_time": "2025-03-11T06:50:42Z",
        "id": 1565019,
        "component": "Networking",
        "creation_time": "2019-07-10T19:53:42Z",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "creation_time": "2019-07-22T17:54:50Z",
        "component": "Panning and Zooming",
        "last_change_time": "2022-10-11T23:06:44Z",
        "id": 1567977,
        "op_sys": "Android",
        "summary": "Scrolling sometimes reacts late on touch input on Android",
        "keywords": [
          "perf:responsiveness",
          "stalled"
        ],
        "priority": "P3",
        "status": "NEW"
      },
      {
        "severity": "S3",
        "creation_time": "2019-07-25T04:47:28Z",
        "component": "Graphics: Layers",
        "id": 1568730,
        "last_change_time": "2024-03-20T19:06:07Z",
        "op_sys": "Unspecified",
        "summary": "Content process stalls in SyncObjectD3D11Client::Synchronize during startup",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness",
          "perf:startup"
        ],
        "status": "NEW"
      },
      {
        "component": "Performance: Responsiveness",
        "creation_time": "2019-07-27T15:05:59Z",
        "last_change_time": "2025-03-21T01:03:22Z",
        "id": 1569412,
        "severity": "S3",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P3",
        "status": "NEW",
        "summary": "Firefox 68 on wife's MacBook Air 2015 macOS 10.14.5 is getting dreadfully slow and no way to find out why",
        "op_sys": "Unspecified"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Opening the preferences page calls HomePage -> getHomepagePref 80 times",
        "priority": "P3",
        "keywords": [
          "perf:frontend",
          "perf:resource-use",
          "perf:startup"
        ],
        "status": "NEW",
        "severity": "S3",
        "last_change_time": "2023-09-21T16:21:19Z",
        "id": 1570271,
        "component": "Settings UI",
        "creation_time": "2019-07-31T10:59:00Z"
      },
      {
        "creation_time": "2019-07-31T18:33:34Z",
        "component": "Layout",
        "last_change_time": "2022-10-11T23:08:37Z",
        "id": 1570417,
        "severity": "S3",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "--",
        "status": "NEW",
        "summary": "Consider using line cursor for nsBlockFrame::AddFrames",
        "op_sys": "Unspecified"
      },
      {
        "status": "NEW",
        "keywords": [
          "main-thread-io",
          "perf:startup"
        ],
        "priority": "P3",
        "summary": "::RegisterDragDrop does main thread I/O during startup",
        "op_sys": "Unspecified",
        "creation_time": "2019-08-01T11:09:55Z",
        "component": "Widget: Win32",
        "id": 1570613,
        "last_change_time": "2022-05-02T16:01:39Z",
        "severity": "S3"
      },
      {
        "summary": "Incremental reflows on New-tab page are showing up in profiler",
        "op_sys": "Unspecified",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW",
        "severity": "S3",
        "last_change_time": "2022-10-11T23:08:59Z",
        "id": 1570770,
        "creation_time": "2019-08-01T20:52:28Z",
        "component": "Layout"
      },
      {
        "creation_time": "2019-08-04T15:07:54Z",
        "component": "Console",
        "last_change_time": "2022-10-11T23:09:31Z",
        "id": 1571286,
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P3",
        "op_sys": "Unspecified",
        "summary": "Firefox won't able to handle requests correctly this leads to slow down or crash the browsers"
      },
      {
        "severity": "S3",
        "creation_time": "2019-08-06T17:47:17Z",
        "component": "CSS Transitions and Animations",
        "last_change_time": "2025-03-12T16:46:47Z",
        "id": 1571800,
        "op_sys": "Unspecified",
        "summary": "Tons of time spent on the main thread when animations are accelerated in nsIFrame::IsScrolledOutOfView.",
        "status": "NEW",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "priority": "P3"
      },
      {
        "keywords": [
          "perf:pageload"
        ],
        "priority": "P3",
        "status": "NEW",
        "summary": "GV should disable logging by default in opt GV builds",
        "op_sys": "All",
        "creation_time": "2019-08-08T20:18:08Z",
        "component": "General",
        "last_change_time": "2022-12-22T21:49:54Z",
        "id": 1572540,
        "severity": "S3"
      },
      {
        "last_change_time": "2024-04-02T13:42:42Z",
        "id": 1573852,
        "creation_time": "2019-08-14T14:58:15Z",
        "component": "Graphics",
        "severity": "S3",
        "keywords": [
          "perf:startup"
        ],
        "priority": "P3",
        "status": "NEW",
        "summary": "Stoping using sync ipc for gfx sanity test",
        "op_sys": "Unspecified"
      },
      {
        "creation_time": "2019-08-15T15:02:34Z",
        "component": "Telemetry",
        "last_change_time": "2024-04-29T09:31:32Z",
        "id": 1574172,
        "severity": "S3",
        "status": "NEW",
        "keywords": [],
        "priority": "P3",
        "op_sys": "All",
        "summary": "make telemetry bits around arrays relatively more efficient"
      },
      {
        "priority": "P3",
        "keywords": [
          "perf:frontend"
        ],
        "status": "NEW",
        "summary": "Create an automated test to ensure we use subpixel AA for titlebar/tabstrip/toolbar text rendering in WebRender",
        "op_sys": "All",
        "component": "Theme",
        "creation_time": "2019-08-22T03:38:38Z",
        "last_change_time": "2022-07-28T12:56:16Z",
        "id": 1575743,
        "severity": "S3"
      },
      {
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:resource-use",
          "power",
          "reproducible"
        ],
        "op_sys": "macOS",
        "summary": "Throttle the refresh driver in the parent process for occluded windows to reduce CPU",
        "component": "Web Painting",
        "creation_time": "2019-09-02T01:02:24Z",
        "id": 1578123,
        "last_change_time": "2025-03-11T07:04:33Z",
        "severity": "--"
      },
      {
        "component": "Session Restore",
        "creation_time": "2019-09-05T20:11:47Z",
        "id": 1579211,
        "last_change_time": "2023-08-04T22:05:11Z",
        "severity": "N/A",
        "keywords": [
          "perf:frontend",
          "perf:startup"
        ],
        "priority": "P3",
        "status": "NEW",
        "op_sys": "macOS",
        "summary": "Treat minimized windows like unloaded tabs"
      },
      {
        "severity": "S3",
        "last_change_time": "2023-09-21T16:23:48Z",
        "id": 1579607,
        "component": "Widget: Gtk",
        "creation_time": "2019-09-07T06:45:10Z",
        "summary": "Linux: tons of stat calls for gtk icons on startup",
        "op_sys": "Linux",
        "status": "NEW",
        "keywords": [
          "main-thread-io",
          "perf:startup"
        ],
        "priority": "--"
      },
      {
        "severity": "S3",
        "id": 1580638,
        "last_change_time": "2024-05-02T16:17:44Z",
        "creation_time": "2019-09-11T22:52:06Z",
        "component": "Shell Integration",
        "op_sys": "Unspecified",
        "summary": "Startup default browser check causes mainthread IO on Linux",
        "priority": "P3",
        "keywords": [
          "main-thread-io",
          "perf",
          "perf:startup",
          "reproducible"
        ],
        "status": "NEW"
      },
      {
        "severity": "S3",
        "component": "Security: Process Sandboxing",
        "creation_time": "2019-09-12T00:19:36Z",
        "id": 1580654,
        "last_change_time": "2023-08-04T22:04:16Z",
        "summary": "Linux sandbox code does mainthread IO to check if all the allowed directories are directories",
        "op_sys": "Linux",
        "keywords": [
          "main-thread-io",
          "perf",
          "perf:startup"
        ],
        "priority": "P5",
        "status": "NEW"
      },
      {
        "summary": "Do not scan for new fonts so aggressively on Linux",
        "op_sys": "Linux",
        "priority": "P3",
        "keywords": [
          "main-thread-io",
          "perf",
          "perf:resource-use"
        ],
        "status": "NEW",
        "severity": "S3",
        "last_change_time": "2023-04-24T17:46:06Z",
        "id": 1580656,
        "component": "Graphics: Text",
        "creation_time": "2019-09-12T00:40:25Z"
      },
      {
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "summary": "Freeze / terrible performance with the attached test case",
        "op_sys": "Unspecified",
        "id": 1581296,
        "last_change_time": "2024-08-24T04:24:52Z",
        "component": "Layout: Block and Inline",
        "creation_time": "2019-09-14T09:57:52Z",
        "severity": "S3"
      },
      {
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P3",
        "status": "NEW",
        "summary": "High GPU on elements with multiple shadows",
        "op_sys": "Unspecified",
        "id": 1581978,
        "last_change_time": "2022-10-11T23:20:09Z",
        "creation_time": "2019-09-17T22:27:15Z",
        "component": "Graphics",
        "severity": "S3"
      },
      {
        "summary": "Recently closed tabs menu is slow due to giant (several mb) data URIs stored for closed tab favicons",
        "op_sys": "Unspecified",
        "status": "NEW",
        "keywords": [
          "perf:frontend"
        ],
        "priority": "P3",
        "severity": "S3",
        "component": "Session Restore",
        "creation_time": "2019-09-23T22:29:16Z",
        "last_change_time": "2025-09-16T17:03:47Z",
        "id": 1583384
      },
      {
        "creation_time": "2019-09-27T02:18:23Z",
        "component": "SVG",
        "id": 1584418,
        "last_change_time": "2025-03-11T07:05:48Z",
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3",
        "summary": "High CPU usage on Firefox likely due to hidden loading spinners",
        "op_sys": "Windows 10"
      },
      {
        "keywords": [
          "main-thread-io",
          "perf"
        ],
        "priority": "--",
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "GetProductDirectory does too much mainthread IO",
        "last_change_time": "2022-10-11T23:25:33Z",
        "id": 1586808,
        "component": "XPCOM",
        "creation_time": "2019-10-07T15:49:31Z",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "creation_time": "2019-10-08T10:57:40Z",
        "component": "Graphics",
        "id": 1587040,
        "last_change_time": "2023-02-23T12:47:47Z",
        "summary": "VSync firing 255 times more frequently than normal during \"display off\" sleep on Windows",
        "op_sys": "Windows",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3",
        "status": "NEW"
      },
      {
        "component": "File Handling",
        "creation_time": "2019-10-16T13:13:10Z",
        "last_change_time": "2023-09-21T16:25:22Z",
        "id": 1589085,
        "severity": "S3",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "summary": "Protocol and MIME info handler service access in the child process causes synchronous IPC",
        "op_sys": "Unspecified"
      },
      {
        "severity": "S3",
        "last_change_time": "2024-11-15T17:47:07Z",
        "id": 1590057,
        "component": "Graphics",
        "creation_time": "2019-10-21T10:29:23Z",
        "op_sys": "Linux",
        "summary": "Fullscreen switching is slow with many tabs",
        "keywords": [
          "perf",
          "perf:responsiveness",
          "regression"
        ],
        "priority": "P3",
        "status": "NEW"
      },
      {
        "op_sys": "All",
        "summary": "Images flash when returning to a tab",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:responsiveness",
          "webcompat:platform-bug",
          "webcompat:site-report"
        ],
        "severity": "S4",
        "last_change_time": "2025-07-28T17:00:59Z",
        "id": 1591030,
        "creation_time": "2019-10-24T10:13:25Z",
        "component": "Graphics: ImageLib"
      },
      {
        "summary": "YouTube live streaming is janky and sometimes the image would freeze completely.",
        "op_sys": "Windows 10",
        "priority": "P3",
        "keywords": [
          "nightly-community",
          "perf:responsiveness"
        ],
        "status": "NEW",
        "severity": "S3",
        "component": "Performance: Responsiveness",
        "creation_time": "2019-10-29T18:17:41Z",
        "id": 1592366,
        "last_change_time": "2025-11-07T07:19:33Z"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "--",
        "summary": "When blur filter is applied on a large area, it delays the full rendering",
        "op_sys": "Unspecified",
        "id": 1596634,
        "last_change_time": "2022-10-11T23:36:12Z",
        "component": "Graphics",
        "creation_time": "2019-11-15T02:15:29Z",
        "severity": "S3"
      },
      {
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:frontend"
        ],
        "summary": "Find and get rid of XBL sync binding hacks in front-end code",
        "op_sys": "All",
        "id": 1597318,
        "last_change_time": "2023-08-05T13:41:49Z",
        "component": "General",
        "creation_time": "2019-11-18T16:39:02Z",
        "severity": "N/A"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Very long main-thread hangs when visiting YouTube in Nightly launched from DMG image - blocked launching the RDD process",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "severity": "S3",
        "id": 1598356,
        "last_change_time": "2022-10-11T23:38:19Z",
        "creation_time": "2019-11-21T16:53:39Z",
        "component": "Audio/Video: Playback"
      },
      {
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P3",
        "status": "NEW",
        "op_sys": "macOS",
        "summary": "Huge GUI lag when adjusting SVG",
        "creation_time": "2019-11-25T19:40:17Z",
        "component": "Graphics",
        "last_change_time": "2022-10-11T23:39:14Z",
        "id": 1599216,
        "severity": "S3"
      },
      {
        "keywords": [
          "perf:pageload"
        ],
        "priority": "P3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "Stream the output of inflate in nsHTTPCompressConv::OnDataAvailable out to another thread to be converted to UTF16 when possible",
        "component": "DOM: Networking",
        "creation_time": "2019-11-26T15:54:32Z",
        "id": 1599472,
        "last_change_time": "2022-10-11T23:39:31Z",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "id": 1599489,
        "last_change_time": "2022-10-11T23:39:32Z",
        "creation_time": "2019-11-26T16:48:09Z",
        "component": "DOM: Networking",
        "summary": "For large json payloads, convert to UTF16 off the main thread",
        "op_sys": "Unspecified",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:pageload"
        ]
      },
      {
        "status": "NEW",
        "keywords": [
          "perf:pageload"
        ],
        "priority": "P3",
        "summary": "Enabling Safebrowsing is introducing significant noise in network throttled pageload tests",
        "op_sys": "Unspecified",
        "id": 1599508,
        "last_change_time": "2026-01-02T14:19:34Z",
        "component": "Performance: Navigation",
        "creation_time": "2019-11-26T17:27:49Z",
        "severity": "S3"
      },
      {
        "summary": "Browsing from about:blank to a URL runs activity-stream code and does an about:newtab reflow",
        "op_sys": "Unspecified",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:pageload"
        ],
        "severity": "S3",
        "id": 1602025,
        "last_change_time": "2022-10-11T23:42:39Z",
        "creation_time": "2019-12-06T17:05:09Z",
        "component": "New Tab Page"
      },
      {
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "main-thread-io",
          "perf:responsiveness"
        ],
        "op_sys": "Unspecified",
        "summary": "FileChannel::MakeFileInputStream does mainthread IO via nsIFile::IsDirectory",
        "component": "Networking: File",
        "creation_time": "2019-12-09T13:32:18Z",
        "last_change_time": "2024-04-03T16:52:39Z",
        "id": 1602434,
        "severity": "S3"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Slow layout on longer WebSocket tables",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "status": "NEW",
        "severity": "S3",
        "id": 1603302,
        "last_change_time": "2022-10-12T14:12:43Z",
        "component": "Netmonitor",
        "creation_time": "2019-12-12T01:03:26Z"
      },
      {
        "summary": "Sync layout flush at the end of page load due to poor interaction between reader mode and add-ons",
        "op_sys": "All",
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:frontend",
          "perf:responsiveness"
        ],
        "status": "NEW",
        "severity": "S3",
        "id": 1603449,
        "last_change_time": "2022-10-11T23:44:17Z",
        "creation_time": "2019-12-12T14:58:40Z",
        "component": "Reader Mode"
      },
      {
        "keywords": [
          "perf:frontend"
        ],
        "priority": "--",
        "status": "NEW",
        "summary": "Reused selected tab is removed and then re-added to tabstrip when restoring session data including a selected tab",
        "op_sys": "Unspecified",
        "creation_time": "2019-12-20T21:52:09Z",
        "component": "Session Restore",
        "last_change_time": "2024-03-20T19:04:10Z",
        "id": 1605486,
        "severity": "S3"
      },
      {
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:resource-use"
        ],
        "summary": "Slashdot tab has consistently high energy impact (score of >19)",
        "op_sys": "Unspecified",
        "last_change_time": "2022-10-11T23:46:42Z",
        "id": 1605513,
        "component": "Performance: General",
        "creation_time": "2019-12-20T23:24:52Z",
        "severity": "S3"
      },
      {
        "priority": "P3",
        "keywords": [
          "meta",
          "perf:pageload"
        ],
        "status": "NEW",
        "summary": "[meta] Geckoview load initiation performance",
        "op_sys": "All",
        "id": 1608826,
        "last_change_time": "2025-03-11T08:24:04Z",
        "component": "General",
        "creation_time": "2020-01-13T14:33:42Z",
        "severity": "N/A"
      },
      {
        "summary": "preload required content and parent process scripts at startup of GeckoView",
        "op_sys": "All",
        "priority": "P3",
        "keywords": [
          "perf:pageload"
        ],
        "status": "NEW",
        "severity": "S3",
        "last_change_time": "2025-09-15T07:58:12Z",
        "id": 1609682,
        "creation_time": "2020-01-16T14:10:52Z",
        "component": "General"
      },
      {
        "severity": "S3",
        "component": "Performance: Startup",
        "creation_time": "2020-01-23T21:25:39Z",
        "last_change_time": "2025-03-20T23:08:21Z",
        "id": 1611279,
        "summary": "Identify Mozilla libraries built for Android that could be built with optimizations for speed",
        "op_sys": "Unspecified",
        "keywords": [
          "perf:pageload",
          "perf:startup"
        ],
        "priority": "P2",
        "status": "NEW"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P3",
        "summary": "High CPU/janky performance when dragging on Tradingview charts",
        "op_sys": "Unspecified",
        "creation_time": "2020-02-10T18:26:12Z",
        "component": "Performance: Responsiveness",
        "id": 1614415,
        "last_change_time": "2025-03-21T01:05:18Z",
        "severity": "S3"
      },
      {
        "last_change_time": "2024-04-03T16:05:44Z",
        "id": 1614689,
        "component": "Address Bar",
        "creation_time": "2020-02-11T16:14:33Z",
        "severity": "S3",
        "priority": "P2",
        "keywords": [
          "perf",
          "perf:frontend",
          "regression"
        ],
        "status": "NEW",
        "summary": "0.12ms uninterruptible reflow at _ensureFormattedHostVisible/<@resource:///modules/UrlbarValueFormatter.sys.mjs:96:9",
        "op_sys": "All"
      },
      {
        "id": 1619141,
        "last_change_time": "2022-10-12T00:01:07Z",
        "component": "Graphics",
        "creation_time": "2020-03-01T15:49:46Z",
        "severity": "S3",
        "status": "NEW",
        "keywords": [],
        "priority": "P3",
        "summary": "poll widget on tagesspiegel.de very laggy",
        "op_sys": "Android"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P2",
        "summary": "Large amounts of time are spent in module import when starting Fenix (applink)",
        "op_sys": "All",
        "creation_time": "2020-03-04T22:40:00Z",
        "component": "General",
        "id": 1620079,
        "last_change_time": "2024-11-15T17:53:34Z",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "creation_time": "2020-03-09T15:21:36Z",
        "component": "Graphics",
        "id": 1621021,
        "last_change_time": "2022-03-16T02:36:18Z",
        "op_sys": "Unspecified",
        "summary": "Running Basemark Web 3.0 test in a background tab seems to bog down the compositor",
        "status": "NEW",
        "keywords": [],
        "priority": "P3"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Rename LastCrash file to _LastCrash",
        "status": "NEW",
        "priority": "--",
        "keywords": [
          "perf:startup"
        ],
        "severity": "S3",
        "component": "Crash Reporting",
        "creation_time": "2020-03-20T22:59:40Z",
        "id": 1624060,
        "last_change_time": "2024-04-02T13:46:28Z"
      },
      {
        "severity": "S3",
        "component": "DOM: Core & HTML",
        "creation_time": "2020-03-25T12:58:57Z",
        "id": 1624846,
        "last_change_time": "2022-10-12T00:05:28Z",
        "summary": "autocomplete.js is excessively slow - only in Firefox",
        "op_sys": "Unspecified",
        "status": "NEW",
        "priority": "P2",
        "keywords": [
          "perf:responsiveness"
        ]
      },
      {
        "keywords": [
          "main-thread-io",
          "perf",
          "perf:startup",
          "reproducible"
        ],
        "priority": "--",
        "status": "NEW",
        "summary": "getNewSideloads checks for system add-ons last modified time on the main thread at the end of startup",
        "op_sys": "Unspecified",
        "component": "Add-ons Manager",
        "creation_time": "2020-03-26T18:44:58Z",
        "last_change_time": "2024-05-02T16:22:46Z",
        "id": 1625271,
        "severity": "S3"
      },
      {
        "priority": "P3",
        "keywords": [
          "main-thread-io",
          "perf",
          "perf:frontend",
          "perf:responsiveness"
        ],
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "Prefs do mainthread IO on all helper apps off disk when they load",
        "last_change_time": "2024-03-20T19:03:05Z",
        "id": 1626009,
        "component": "Settings UI",
        "creation_time": "2020-03-30T16:35:47Z",
        "severity": "S3"
      },
      {
        "summary": "High CPU load while waiting for a page to load (MacOS)",
        "op_sys": "Unspecified",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:resource-use"
        ],
        "severity": "S3",
        "component": "Graphics",
        "creation_time": "2020-03-31T13:41:34Z",
        "id": 1626263,
        "last_change_time": "2022-05-12T12:27:43Z"
      },
      {
        "keywords": [
          "nightly-community",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "status": "NEW",
        "op_sys": "Windows 10",
        "summary": "Firefox Nightly hangs when displaying a Grafana",
        "id": 1626719,
        "last_change_time": "2024-11-12T18:19:47Z",
        "component": "JavaScript Engine",
        "creation_time": "2020-04-01T19:12:10Z",
        "severity": "S3"
      },
      {
        "summary": "URLDecorationAnnotationsService started very early during startup (profile-after-change)",
        "op_sys": "Unspecified",
        "keywords": [
          "perf:startup"
        ],
        "priority": "P3",
        "status": "NEW",
        "severity": "S3",
        "creation_time": "2020-04-17T12:24:08Z",
        "component": "Privacy: Anti-Tracking",
        "last_change_time": "2025-08-22T16:26:21Z",
        "id": 1630939
      },
      {
        "id": 1630949,
        "last_change_time": "2025-08-22T16:26:38Z",
        "creation_time": "2020-04-17T13:05:55Z",
        "component": "Privacy: Anti-Tracking",
        "severity": "S3",
        "priority": "P3",
        "keywords": [
          "perf:startup"
        ],
        "status": "NEW",
        "summary": "UrlClassifierSkipListService started during startup for uninteresting http requests",
        "op_sys": "Unspecified"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf:startup"
        ],
        "priority": "P3",
        "op_sys": "Unspecified",
        "summary": "Determine what DLLs should be prefetched from dependentlibs.list",
        "id": 1635620,
        "last_change_time": "2024-03-20T18:57:21Z",
        "creation_time": "2020-05-05T23:44:09Z",
        "component": "Startup and Profile System",
        "severity": "--"
      },
      {
        "severity": "S3",
        "id": 1639280,
        "last_change_time": "2022-03-02T16:38:20Z",
        "creation_time": "2020-05-19T17:40:49Z",
        "component": "Graphics: CanvasWebGL",
        "summary": "Unacceptable performance and memory consumption on Apart Posters VR experience.",
        "op_sys": "Android",
        "status": "NEW",
        "priority": "P2",
        "keywords": [
          "perf:responsiveness"
        ]
      },
      {
        "severity": "S4",
        "creation_time": "2020-06-03T16:48:21Z",
        "component": "JavaScript: GC",
        "last_change_time": "2024-11-12T17:41:30Z",
        "id": 1643064,
        "summary": "Memory leak in foreground webworker",
        "op_sys": "All",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3",
        "status": "NEW"
      },
      {
        "summary": "Memory leak degradation",
        "op_sys": "Linux",
        "status": "NEW",
        "keywords": [
          "nightly-community",
          "perf:resource-use"
        ],
        "priority": "P3",
        "severity": "S3",
        "id": 1646496,
        "last_change_time": "2025-05-23T13:32:26Z",
        "component": "Performance: Memory",
        "creation_time": "2020-06-17T20:06:18Z"
      },
      {
        "op_sys": "macOS",
        "summary": "High CPU usage by idle Firefox",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:resource-use"
        ],
        "severity": "S3",
        "id": 1648233,
        "last_change_time": "2025-03-11T07:11:09Z",
        "component": "Performance: General",
        "creation_time": "2020-06-24T19:55:26Z"
      },
      {
        "status": "NEW",
        "priority": "--",
        "keywords": [
          "perf:pageload"
        ],
        "summary": "Loading https://www.worldometers.info/coronavirus/#countries is occasionally slow, takes lots of time in query_selector_slow",
        "op_sys": "Unspecified",
        "last_change_time": "2022-03-02T16:39:14Z",
        "id": 1650063,
        "component": "CSS Parsing and Computation",
        "creation_time": "2020-07-02T12:30:31Z",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "component": "Session Restore",
        "creation_time": "2020-07-02T23:11:56Z",
        "id": 1650250,
        "last_change_time": "2026-03-11T14:46:34Z",
        "op_sys": "Unspecified",
        "summary": "Slow startup/high CPU use when restoring Firefox session with about:newtab as active tab in all windows",
        "status": "NEW",
        "priority": "P2",
        "keywords": [
          "perf:frontend",
          "perf:responsiveness",
          "perf:startup"
        ]
      },
      {
        "severity": "S2",
        "id": 1650288,
        "last_change_time": "2025-09-15T16:59:40Z",
        "creation_time": "2020-07-03T04:45:51Z",
        "component": "Site Reports",
        "summary": "lazy-loading images don't always show up (until you scroll past them) on https://terraria.gamepedia.com/Guide:Walkthrough",
        "op_sys": "Android",
        "keywords": [
          "webcompat:needs-diagnosis"
        ],
        "priority": "P3",
        "status": "NEW"
      },
      {
        "severity": "S3",
        "component": "General",
        "creation_time": "2020-07-08T18:01:19Z",
        "last_change_time": "2024-05-02T16:32:58Z",
        "id": 1651434,
        "summary": "Tab loading takes a very long time after a new startup or a restart",
        "op_sys": "Windows 10",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:responsiveness",
          "perf:startup"
        ]
      },
      {
        "status": "NEW",
        "keywords": [
          "perf:startup",
          "regression"
        ],
        "priority": "P3",
        "summary": "ts_paint_webext regression due to a performance cliff (tripped in the second instance by separating out opensearch initialization )",
        "op_sys": "Windows 10",
        "id": 1652273,
        "last_change_time": "2025-03-20T23:08:18Z",
        "creation_time": "2020-07-11T20:51:55Z",
        "component": "Performance: Startup",
        "severity": "S4"
      },
      {
        "creation_time": "2020-07-18T23:15:21Z",
        "component": "Layout",
        "last_change_time": "2025-03-11T07:13:08Z",
        "id": 1653809,
        "severity": "S3",
        "priority": "P3",
        "keywords": [
          "perf:resource-use"
        ],
        "status": "NEW",
        "summary": "Firefox taking up CPU (fans going crazy) on realsimple.com",
        "op_sys": "Unspecified"
      },
      {
        "keywords": [
          "perf",
          "perf:frontend"
        ],
        "priority": "P2",
        "status": "NEW",
        "op_sys": "Windows",
        "summary": "Page load for about:logins is slow on Windows",
        "id": 1658766,
        "last_change_time": "2024-04-02T16:15:51Z",
        "component": "about:logins",
        "creation_time": "2020-08-12T16:40:23Z",
        "severity": "S3"
      },
      {
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "op_sys": "Unspecified",
        "summary": "Jank when closing tabs in a full tab bar from session restore",
        "last_change_time": "2025-04-24T20:21:29Z",
        "id": 1659286,
        "component": "Performance: Responsiveness",
        "creation_time": "2020-08-15T18:14:00Z",
        "severity": "S4"
      },
      {
        "keywords": [
          "perf:pageload"
        ],
        "priority": "--",
        "status": "NEW",
        "summary": "Geektyrant takes 4x as long as Chrome to load",
        "op_sys": "Unspecified",
        "last_change_time": "2023-07-04T21:52:42Z",
        "id": 1659831,
        "component": "Layout: Grid",
        "creation_time": "2020-08-18T20:45:42Z",
        "severity": "S3"
      },
      {
        "summary": "WebBrowserPersistSerialize actor does mainthread IO",
        "op_sys": "Unspecified",
        "status": "NEW",
        "keywords": [
          "main-thread-io",
          "perf:responsiveness"
        ],
        "priority": "--",
        "severity": "S3",
        "component": "DOM: Core & HTML",
        "creation_time": "2020-08-29T22:16:34Z",
        "last_change_time": "2022-03-02T16:40:14Z",
        "id": 1661941
      },
      {
        "component": "Performance: Navigation",
        "creation_time": "2020-09-24T22:25:35Z",
        "last_change_time": "2025-03-21T02:42:47Z",
        "id": 1667248,
        "severity": "S3",
        "keywords": [
          "perf:pageload"
        ],
        "priority": "P3",
        "status": "NEW",
        "summary": "Fenix loads cloudflare.com 5 seconds slower than Chrome",
        "op_sys": "Unspecified"
      },
      {
        "component": "Performance: Navigation",
        "creation_time": "2020-09-24T22:28:02Z",
        "last_change_time": "2025-03-21T02:41:39Z",
        "id": 1667250,
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf:pageload"
        ],
        "priority": "P2",
        "summary": "Fenix loads adobe.com 4 seconds slower than Chrome",
        "op_sys": "Unspecified"
      },
      {
        "id": 1667904,
        "last_change_time": "2022-08-30T17:30:35Z",
        "creation_time": "2020-09-28T22:58:27Z",
        "component": "Performance: General",
        "severity": "N/A",
        "priority": "P2",
        "keywords": [],
        "status": "NEW",
        "summary": "Speculatively parse async and link preload scripts",
        "op_sys": "Unspecified"
      },
      {
        "severity": "--",
        "id": 1669307,
        "last_change_time": "2024-06-28T12:21:34Z",
        "component": "XPCOM",
        "creation_time": "2020-10-05T18:14:28Z",
        "op_sys": "Unspecified",
        "summary": "Investigate relaxing windows timer granularity, especially on battery, to reduce energy use",
        "priority": "--",
        "keywords": [
          "perf:resource-use"
        ],
        "status": "NEW"
      },
      {
        "summary": "Massive memory leak when using the browser console",
        "op_sys": "Unspecified",
        "priority": "P2",
        "keywords": [
          "perf",
          "perf:resource-use"
        ],
        "status": "NEW",
        "severity": "S3",
        "id": 1670060,
        "last_change_time": "2024-03-20T18:53:58Z",
        "creation_time": "2020-10-08T17:47:10Z",
        "component": "Console"
      },
      {
        "component": "XPCOM",
        "creation_time": "2020-11-09T17:12:11Z",
        "last_change_time": "2025-03-11T08:48:44Z",
        "id": 1676210,
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "memory-footprint",
          "perf",
          "perf:responsiveness"
        ],
        "priority": "--",
        "op_sys": "Unspecified",
        "summary": "High memory and CPU usage on www.tvnow.de with garbage collector involved"
      },
      {
        "severity": "S4",
        "last_change_time": "2022-03-02T16:41:05Z",
        "id": 1676889,
        "component": "Networking",
        "creation_time": "2020-11-12T15:52:18Z",
        "summary": "http requests to localhost ports where nothing is listening take longer to fail than in blink",
        "op_sys": "All",
        "status": "NEW",
        "keywords": [
          "perf",
          "perf:pageload"
        ],
        "priority": "P3"
      },
      {
        "severity": "S3",
        "creation_time": "2020-11-25T19:37:06Z",
        "component": "Performance: Responsiveness",
        "last_change_time": "2025-04-24T20:34:49Z",
        "id": 1679309,
        "summary": "More checkerboarding than Edge on politico.com, on a two core machine",
        "op_sys": "Unspecified",
        "priority": "P3",
        "keywords": [
          "nightly-community",
          "perf:responsiveness"
        ],
        "status": "NEW"
      },
      {
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P3",
        "status": "NEW",
        "summary": "Add improved telemetry for paint responsiveness",
        "op_sys": "Unspecified",
        "creation_time": "2020-11-30T13:11:46Z",
        "component": "Performance: Responsiveness",
        "last_change_time": "2025-03-21T01:03:18Z",
        "id": 1679770,
        "severity": "--"
      },
      {
        "component": "Security: Process Sandboxing",
        "creation_time": "2020-11-30T19:46:07Z",
        "last_change_time": "2022-03-02T16:41:27Z",
        "id": 1679863,
        "severity": "S3",
        "status": "NEW",
        "keywords": [],
        "priority": "P5",
        "summary": "HTMLCanvasElement.getContext is slow",
        "op_sys": "Linux"
      },
      {
        "summary": "[meta] Performance investigations surrounding large IndexedDB responses",
        "op_sys": "All",
        "status": "NEW",
        "keywords": [
          "meta",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "severity": "S4",
        "last_change_time": "2024-12-13T15:53:54Z",
        "id": 1680860,
        "creation_time": "2020-12-05T01:25:45Z",
        "component": "Storage: IndexedDB"
      },
      {
        "creation_time": "2020-12-13T11:12:12Z",
        "component": "Graphics: WebRender",
        "last_change_time": "2024-04-03T02:15:48Z",
        "id": 1682163,
        "severity": "S3",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:resource-use"
        ],
        "summary": "Excessive memory use causing Firefox Quantum and other app crashes",
        "op_sys": "Unspecified"
      },
      {
        "severity": "S3",
        "id": 1682261,
        "last_change_time": "2025-03-11T07:13:01Z",
        "creation_time": "2020-12-14T11:15:49Z",
        "component": "Audio/Video: Playback",
        "summary": "http://www.jabra.com.de claims up to 20% CPU load as background tab or when Firefox is hidden",
        "op_sys": "Unspecified",
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:resource-use",
          "power"
        ],
        "status": "NEW"
      },
      {
        "id": 1682986,
        "last_change_time": "2022-03-02T16:41:43Z",
        "component": "Graphics: Canvas2D",
        "creation_time": "2020-12-16T23:01:37Z",
        "severity": "S3",
        "priority": "--",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW",
        "op_sys": "Android",
        "summary": "Choppy Canvas2D on Android on this page"
      },
      {
        "severity": "S4",
        "creation_time": "2020-12-18T05:43:00Z",
        "component": "Graphics: WebRender",
        "id": 1683250,
        "last_change_time": "2022-03-02T16:41:44Z",
        "op_sys": "Android",
        "summary": "Laggy swipes on swiperjs.com",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ]
      },
      {
        "status": "NEW",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P3",
        "summary": "[Bug] Scrolling stutter on gadgets.ndtv.com website",
        "op_sys": "Android",
        "component": "Graphics: WebRender",
        "creation_time": "2020-12-18T17:37:18Z",
        "id": 1683354,
        "last_change_time": "2024-02-27T18:27:19Z",
        "severity": "S4"
      },
      {
        "priority": "P3",
        "keywords": [
          "perf:responsiveness",
          "regression"
        ],
        "status": "NEW",
        "op_sys": "Windows 10",
        "summary": "Huge performance regression in webgame on https://project-f.github.io",
        "creation_time": "2020-12-20T17:53:30Z",
        "component": "Performance: Responsiveness",
        "last_change_time": "2025-03-21T01:04:40Z",
        "id": 1683560,
        "severity": "S3"
      },
      {
        "op_sys": "Unspecified",
        "summary": "NYmag article causes laptop fans to kick in",
        "priority": "P3",
        "keywords": [
          "nightly-community"
        ],
        "status": "NEW",
        "severity": "S3",
        "creation_time": "2020-12-26T05:40:05Z",
        "component": "Performance: General",
        "id": 1684233,
        "last_change_time": "2022-08-31T11:57:52Z"
      },
      {
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:frontend",
          "perf:responsiveness"
        ],
        "summary": "Noticeable UI lag when deleting lots of history entries because TopSitesFeed.refresh is called for every single one",
        "op_sys": "Unspecified",
        "creation_time": "2021-01-05T18:58:03Z",
        "component": "Top Sites",
        "id": 1685140,
        "last_change_time": "2024-04-03T13:48:35Z",
        "severity": "S3"
      },
      {
        "priority": "P3",
        "keywords": [
          "perf:resource-use",
          "regression"
        ],
        "status": "NEW",
        "summary": "Too many tabs of one site can cause Firefox to lag",
        "op_sys": "Windows 10",
        "creation_time": "2021-01-09T03:18:07Z",
        "component": "Performance: General",
        "id": 1685835,
        "last_change_time": "2025-05-23T13:44:28Z",
        "severity": "S3"
      },
      {
        "last_change_time": "2022-10-11T23:58:11Z",
        "id": 1687376,
        "component": "General",
        "creation_time": "2021-01-18T20:44:14Z",
        "severity": "S3",
        "priority": "P2",
        "keywords": [
          "perf:resource-use"
        ],
        "status": "NEW",
        "summary": "Large number of idle processes (with fork server enabled?)",
        "op_sys": "Linux"
      },
      {
        "id": 1688073,
        "last_change_time": "2024-03-20T18:52:32Z",
        "creation_time": "2021-01-21T20:44:06Z",
        "component": "Bookmarks & History",
        "severity": "S3",
        "keywords": [
          "perf",
          "perf:frontend",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "status": "NEW",
        "summary": "Showing the bookmarks toolbar (Ctrl+Shift+B) janks the parent process for several seconds when there are many windows",
        "op_sys": "Unspecified"
      },
      {
        "severity": "S3",
        "last_change_time": "2023-07-23T23:05:10Z",
        "id": 1689746,
        "creation_time": "2021-01-29T22:22:40Z",
        "component": "Graphics: WebRender",
        "summary": "Slow scrolling on weather.com today page",
        "op_sys": "Unspecified",
        "keywords": [
          "nightly-community"
        ],
        "priority": "P3",
        "status": "NEW"
      },
      {
        "op_sys": "All",
        "summary": "Detect no-op renders during frame building and avoid the render, to reduce power usage",
        "keywords": [
          "perf:resource-use",
          "power"
        ],
        "priority": "P3",
        "status": "NEW",
        "severity": "S3",
        "id": 1690654,
        "last_change_time": "2024-07-23T03:17:08Z",
        "component": "Graphics: WebRender",
        "creation_time": "2021-02-03T21:20:38Z"
      },
      {
        "op_sys": "Unspecified",
        "summary": "suspend cpu to background tabs",
        "priority": "--",
        "keywords": [
          "perf:resource-use",
          "reproducible"
        ],
        "status": "NEW",
        "severity": "--",
        "last_change_time": "2025-03-11T08:41:57Z",
        "id": 1691100,
        "creation_time": "2021-02-05T17:07:58Z",
        "component": "Performance: General"
      },
      {
        "summary": "Opening large data URLs in a new tab is very slow to display text in URL bar",
        "op_sys": "Unspecified",
        "priority": "--",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW",
        "severity": "S4",
        "last_change_time": "2022-03-02T16:42:51Z",
        "id": 1694420,
        "creation_time": "2021-02-23T15:39:36Z",
        "component": "Layout: Text and Fonts"
      },
      {
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness",
          "reproducible"
        ],
        "op_sys": "Unspecified",
        "summary": "JS/DOM/Layout Jank from telemetry.mozilla.org dashboard",
        "component": "General",
        "creation_time": "2021-02-26T14:49:51Z",
        "last_change_time": "2022-08-31T12:12:04Z",
        "id": 1695232,
        "severity": "S3"
      },
      {
        "severity": "S3",
        "creation_time": "2021-03-14T09:11:18Z",
        "component": "Performance: General",
        "id": 1698338,
        "last_change_time": "2022-09-15T14:51:30Z",
        "summary": "Ads on https://www.golem.de/ cause a permanent ~50% load of Firefox",
        "op_sys": "Unspecified",
        "keywords": [
          "power"
        ],
        "priority": "P2",
        "status": "NEW"
      },
      {
        "severity": "S4",
        "creation_time": "2021-03-23T15:31:54Z",
        "component": "XPConnect",
        "id": 1700377,
        "last_change_time": "2022-12-01T02:46:30Z",
        "op_sys": "Unspecified",
        "summary": "Consider auto-terminating slow scripts if they are running in a process only serving ads",
        "status": "NEW",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3"
      },
      {
        "op_sys": "Unspecified",
        "summary": "UITour should not iterate through all browser windows for every closed tab",
        "priority": "--",
        "keywords": [
          "perf:frontend",
          "perf:responsiveness"
        ],
        "status": "NEW",
        "severity": "S3",
        "id": 1708802,
        "last_change_time": "2022-04-28T14:19:42Z",
        "creation_time": "2021-04-30T19:28:55Z",
        "component": "Tours"
      },
      {
        "keywords": [
          "perf:resource-use",
          "power"
        ],
        "priority": "P2",
        "status": "NEW",
        "summary": "Switch from select() to poll for MacOS to reduce CPU usage",
        "op_sys": "macOS",
        "creation_time": "2021-05-03T19:31:39Z",
        "component": "Networking",
        "last_change_time": "2024-10-29T14:11:04Z",
        "id": 1709175,
        "severity": "S3"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf:startup"
        ],
        "priority": "P5",
        "op_sys": "Windows 10",
        "summary": "When restarting after an upgrade Firefox hangs...",
        "last_change_time": "2022-08-31T12:34:24Z",
        "id": 1713129,
        "creation_time": "2021-05-27T14:21:23Z",
        "component": "Layout: Text and Fonts",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "id": 1719164,
        "last_change_time": "2025-04-21T14:12:35Z",
        "creation_time": "2021-07-05T14:07:36Z",
        "component": "Web Painting",
        "op_sys": "Windows",
        "summary": "Terrible stuttering of mouse and \"drag preview\" on https://codepen.io/trending if you click-and-drag on a pen . Hang on Parent Process",
        "keywords": [
          "parity-chrome",
          "perf:responsiveness"
        ],
        "priority": "P2",
        "status": "NEW"
      },
      {
        "summary": "Leaving Firefox open for a few hours makes it use 51 gigs of RAM",
        "op_sys": "Unspecified",
        "priority": "P3",
        "keywords": [
          "memory-footprint",
          "perf:resource-use"
        ],
        "status": "NEW",
        "severity": "S3",
        "component": "Graphics",
        "creation_time": "2021-07-23T17:39:44Z",
        "id": 1722060,
        "last_change_time": "2024-02-27T16:13:03Z"
      },
      {
        "priority": "P3",
        "keywords": [
          "main-thread-io",
          "perf"
        ],
        "status": "NEW",
        "op_sys": "All",
        "summary": "Setting default downloads directory to unavailable windows share makes opening settings cause several seconds of parent process mainthread jank (net_GetURLSpecFromFile causes slow mainthread IO)",
        "id": 1722304,
        "last_change_time": "2024-04-03T16:54:50Z",
        "creation_time": "2021-07-26T13:07:58Z",
        "component": "Networking: File",
        "severity": "S3"
      },
      {
        "id": 1722641,
        "last_change_time": "2023-01-09T10:42:57Z",
        "creation_time": "2021-07-28T02:36:30Z",
        "component": "DOM: Navigation",
        "severity": "S3",
        "priority": "P2",
        "keywords": [
          "perf:pageload",
          "regression"
        ],
        "status": "NEW",
        "summary": "Performance regressions from turning on bfcache-in-parent for fission, mostly in warmload",
        "op_sys": "All"
      },
      {
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "--",
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "Juddering on touchpad scroll on Facebook Marketplace",
        "last_change_time": "2022-03-02T16:44:22Z",
        "id": 1722764,
        "creation_time": "2021-07-28T18:07:54Z",
        "component": "Graphics: WebRender",
        "severity": "S4"
      },
      {
        "creation_time": "2021-08-04T04:37:00Z",
        "component": "JavaScript Engine",
        "last_change_time": "2022-03-08T14:16:57Z",
        "id": 1723891,
        "severity": "S3",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:pageload"
        ],
        "summary": "outlook.live.com responsiveness login is bad at login time",
        "op_sys": "Windows 10"
      },
      {
        "summary": "Virtual book rendering is janky on zoom",
        "op_sys": "Android",
        "status": "NEW",
        "priority": "--",
        "keywords": [
          "perf:responsiveness"
        ],
        "severity": "S3",
        "component": "Graphics: ImageLib",
        "creation_time": "2021-08-09T05:51:39Z",
        "id": 1724660,
        "last_change_time": "2022-03-02T16:44:30Z"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "op_sys": "Unspecified",
        "summary": "Poor performance printing to PDF from large documents",
        "last_change_time": "2025-03-21T01:03:31Z",
        "id": 1724783,
        "creation_time": "2021-08-09T20:02:01Z",
        "component": "Performance: Responsiveness",
        "severity": "--"
      },
      {
        "id": 1725178,
        "last_change_time": "2025-05-23T13:46:17Z",
        "component": "Performance: General",
        "creation_time": "2021-08-11T14:23:52Z",
        "severity": "S3",
        "priority": "P3",
        "keywords": [
          "perf:resource-use"
        ],
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "Worse CPU usage on twitch than Edge/Chrome"
      },
      {
        "summary": "Higher power usage on gem.cbc.ca in Firefox than Chrome on macOS (2019 MBP 10.15)",
        "op_sys": "Unspecified",
        "status": "NEW",
        "priority": "--",
        "keywords": [
          "perf:resource-use"
        ],
        "severity": "--",
        "component": "Performance: General",
        "creation_time": "2021-08-24T16:19:24Z",
        "last_change_time": "2022-03-02T16:44:52Z",
        "id": 1727370
      },
      {
        "severity": "S3",
        "creation_time": "2021-09-14T19:43:45Z",
        "component": "Graphics: CanvasWebGL",
        "id": 1730761,
        "last_change_time": "2022-03-02T16:45:09Z",
        "summary": "WebGL shader compilation janks scrolling on this page",
        "op_sys": "All",
        "status": "NEW",
        "priority": "--",
        "keywords": [
          "perf:responsiveness"
        ]
      },
      {
        "severity": "S3",
        "component": "Graphics: WebRender",
        "creation_time": "2021-09-22T16:56:32Z",
        "last_change_time": "2025-03-11T08:49:41Z",
        "id": 1732144,
        "summary": "Janky scrolling on intab.io (dual core CPU)",
        "op_sys": "Unspecified",
        "status": "NEW",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "--"
      },
      {
        "summary": "Pinch to zoom lag in fenix on gsmarena's desktop site",
        "op_sys": "Android",
        "priority": "--",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW",
        "severity": "S4",
        "creation_time": "2021-09-22T22:12:49Z",
        "component": "Graphics: WebRender",
        "id": 1732196,
        "last_change_time": "2024-03-27T02:32:57Z"
      },
      {
        "severity": "S3",
        "last_change_time": "2022-03-02T16:45:36Z",
        "id": 1733763,
        "creation_time": "2021-10-02T08:16:36Z",
        "component": "Layout: Flexbox",
        "op_sys": "Unspecified",
        "summary": "Lichess chess playthrough is a bit slower in Firefox as compared to Chrome",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "--",
        "status": "NEW"
      },
      {
        "severity": "S4",
        "id": 1743481,
        "last_change_time": "2022-04-07T15:20:22Z",
        "component": "Graphics",
        "creation_time": "2021-11-29T20:10:27Z",
        "op_sys": "Windows 10",
        "summary": "Inconsistent vsync timings on Windows with some configurations (multiple monitors?)",
        "priority": "--",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW"
      },
      {
        "severity": "S3",
        "last_change_time": "2022-09-12T15:24:36Z",
        "id": 1747679,
        "creation_time": "2021-12-27T04:39:34Z",
        "component": "Graphics: ImageLib",
        "summary": "high mem usage",
        "op_sys": "Unspecified",
        "status": "NEW",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3"
      },
      {
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "op_sys": "Unspecified",
        "summary": "\"This page is slowing down your browser\" notifications cause resize events, which can hang slow-to-layout pages even more",
        "component": "Performance: Responsiveness",
        "creation_time": "2022-01-16T21:38:52Z",
        "last_change_time": "2025-03-21T01:04:48Z",
        "id": 1750463,
        "severity": "S3"
      },
      {
        "component": "New Tab Page",
        "creation_time": "2022-01-21T18:06:43Z",
        "last_change_time": "2024-04-16T17:11:20Z",
        "id": 1751459,
        "severity": "S4",
        "priority": "P3",
        "keywords": [
          "perf:frontend",
          "perf:responsiveness"
        ],
        "status": "NEW",
        "op_sys": "All",
        "summary": "Use a lazy pref getter for the contile prefs in TopSitesFeed.jsm"
      },
      {
        "keywords": [
          "perf:startup"
        ],
        "priority": "P3",
        "status": "NEW",
        "op_sys": "All",
        "summary": "Script cache is not used on next process if a page load did not occur in the previous process",
        "id": 1753336,
        "last_change_time": "2023-09-30T14:41:53Z",
        "component": "General",
        "creation_time": "2022-02-03T01:17:31Z",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "id": 1755632,
        "last_change_time": "2023-04-04T16:32:29Z",
        "component": "Graphics: CanvasWebGL",
        "creation_time": "2022-02-16T07:56:13Z",
        "summary": "Site hangs for a long time on PWebGL or BHR?",
        "op_sys": "Unspecified",
        "status": "NEW",
        "priority": "--",
        "keywords": [
          "perf"
        ]
      },
      {
        "summary": "Process using 100% of the CPU on the main thread recording infinite recursion error stacks",
        "op_sys": "Unspecified",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "power",
          "regression"
        ],
        "severity": "S4",
        "last_change_time": "2026-01-22T07:39:27Z",
        "id": 1755864,
        "component": "XPCOM",
        "creation_time": "2022-02-17T09:02:59Z"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Add mechanism to load large groups of tabs in smaller batches",
        "keywords": [
          "perf:responsiveness",
          "reproducible"
        ],
        "priority": "P3",
        "status": "NEW",
        "severity": "N/A",
        "component": "Tabbed Browser",
        "creation_time": "2022-02-20T20:25:36Z",
        "last_change_time": "2024-12-26T08:19:29Z",
        "id": 1756368
      },
      {
        "severity": "S3",
        "component": "Graphics: WebRender",
        "creation_time": "2022-03-08T22:18:44Z",
        "id": 1758582,
        "last_change_time": "2023-03-06T00:31:56Z",
        "summary": "The fancy apple product pages stutter heavily during scroll animation",
        "op_sys": "Linux",
        "status": "NEW",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "--"
      },
      {
        "priority": "--",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW",
        "summary": "SnowWhiteKiller::~SnowWhiteKiller() is very visible in hang reports",
        "op_sys": "Unspecified",
        "creation_time": "2022-03-11T10:37:23Z",
        "component": "XPCOM",
        "last_change_time": "2022-12-12T19:11:49Z",
        "id": 1759112,
        "severity": "S3"
      },
      {
        "id": 1761734,
        "last_change_time": "2022-12-08T17:11:00Z",
        "component": "PDF Viewer",
        "creation_time": "2022-03-28T09:34:21Z",
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "perf:pageload",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "summary": "Slow drawing of this PDF file",
        "op_sys": "Unspecified"
      },
      {
        "severity": "S3",
        "id": 1764054,
        "last_change_time": "2024-04-03T01:47:10Z",
        "component": "Graphics: WebRender",
        "creation_time": "2022-04-11T10:31:28Z",
        "op_sys": "Unspecified",
        "summary": "FF91 and newer produce *huge* CPU-Load in certain situations",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "--",
        "status": "NEW"
      },
      {
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "op_sys": "Linux",
        "summary": "Jank when scrolling https://www.floatplane.com/channel/linustechtips/home",
        "component": "Web Painting",
        "creation_time": "2022-04-30T04:10:02Z",
        "id": 1767129,
        "last_change_time": "2022-05-24T03:22:26Z",
        "severity": "S3"
      },
      {
        "id": 1768359,
        "last_change_time": "2022-09-09T07:18:52Z",
        "component": "Graphics: Canvas2D",
        "creation_time": "2022-05-08T07:05:02Z",
        "severity": "S4",
        "keywords": [
          "perf:resource-use",
          "perf:responsiveness"
        ],
        "priority": "P2",
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "Scrolling through TurnitIn marking page spikes CPU to 20% and is incredibly slow"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "op_sys": "Linux",
        "summary": "CSS-Only Cube Pack has jank",
        "id": 1768552,
        "last_change_time": "2025-03-11T07:17:40Z",
        "component": "Graphics: WebRender",
        "creation_time": "2022-05-09T22:47:02Z",
        "severity": "S3"
      },
      {
        "creation_time": "2022-05-24T17:26:03Z",
        "component": "Audio/Video: Playback",
        "last_change_time": "2022-09-01T14:13:26Z",
        "id": 1770995,
        "severity": "S3",
        "priority": "P3",
        "keywords": [
          "perf:resource-use",
          "power"
        ],
        "status": "NEW",
        "summary": "Unnecessary power use to play soundless video below the fold",
        "op_sys": "Unspecified"
      },
      {
        "priority": "--",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW",
        "summary": "Jank when opening menu on https://www.designpluspeace.com/",
        "op_sys": "Linux",
        "last_change_time": "2022-10-29T03:04:49Z",
        "id": 1771833,
        "creation_time": "2022-05-31T02:34:27Z",
        "component": "Graphics: WebRender",
        "severity": "S4"
      },
      {
        "priority": "--",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW",
        "summary": "Jank when scrolling https://webflow.com/",
        "op_sys": "Linux",
        "last_change_time": "2025-11-07T07:20:50Z",
        "id": 1771845,
        "creation_time": "2022-05-31T05:40:56Z",
        "component": "Graphics: WebRender",
        "severity": "S4"
      },
      {
        "creation_time": "2022-05-31T05:46:44Z",
        "component": "Graphics: WebRender",
        "last_change_time": "2022-09-01T14:19:50Z",
        "id": 1771846,
        "severity": "S4",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "--",
        "status": "NEW",
        "summary": "Jank when navigating https://www.euphoriques.com/",
        "op_sys": "Linux"
      },
      {
        "summary": "Jank when opening hamburger menu on YouTube",
        "op_sys": "Linux",
        "status": "NEW",
        "keywords": [
          "perf:animation",
          "top50"
        ],
        "priority": "P3",
        "severity": "S3",
        "component": "Layout",
        "creation_time": "2022-05-31T20:07:33Z",
        "last_change_time": "2022-06-23T13:58:36Z",
        "id": 1771991
      },
      {
        "op_sys": "Linux",
        "summary": "Slow game performance on jklm.fun",
        "priority": "--",
        "keywords": [
          "perf:animation",
          "perf:responsiveness"
        ],
        "status": "NEW",
        "severity": "S3",
        "last_change_time": "2025-03-03T08:00:08Z",
        "id": 1772346,
        "creation_time": "2022-06-02T15:41:27Z",
        "component": "Graphics: Canvas2D"
      },
      {
        "severity": "S3",
        "id": 1772903,
        "last_change_time": "2022-11-01T12:46:28Z",
        "component": "Crash Reporting",
        "creation_time": "2022-06-06T21:05:32Z",
        "op_sys": "Windows",
        "summary": "GetLoadedModulesRunnable slow at shutdown",
        "status": "NEW",
        "keywords": [],
        "priority": "--"
      },
      {
        "severity": "S3",
        "component": "Layout",
        "creation_time": "2022-06-17T11:04:37Z",
        "id": 1774775,
        "last_change_time": "2025-09-18T12:32:49Z",
        "summary": "Viewing source of discourse.mozilla.org hangs indefinitely",
        "op_sys": "All",
        "priority": "--",
        "keywords": [
          "hang",
          "perf:responsiveness",
          "reproducible"
        ],
        "status": "NEW"
      },
      {
        "severity": "S3",
        "id": 1786918,
        "last_change_time": "2025-07-15T22:56:50Z",
        "component": "Graphics: ImageLib",
        "creation_time": "2022-08-24T17:23:13Z",
        "summary": "too much sync decoding of images on https://martyr.shop/products/sealed-bags",
        "op_sys": "Unspecified",
        "keywords": [
          "perf:animation",
          "perf:responsiveness",
          "reproducible"
        ],
        "priority": "--",
        "status": "NEW"
      },
      {
        "severity": "S3",
        "id": 1792449,
        "last_change_time": "2022-10-31T10:55:26Z",
        "creation_time": "2022-09-26T15:12:15Z",
        "component": "Toolbars and Customization",
        "op_sys": "All",
        "summary": "When opening a window, the address bar changes size and moves from right to left, when (Extension) Overflow Button is visible on the Toolbar",
        "priority": "P3",
        "keywords": [
          "perf:animation",
          "reproducible"
        ],
        "status": "NEW"
      },
      {
        "id": 1796080,
        "last_change_time": "2023-01-26T18:28:39Z",
        "creation_time": "2022-10-19T09:09:20Z",
        "component": "XPCOM",
        "severity": "S3",
        "keywords": [
          "regression"
        ],
        "priority": "--",
        "status": "NEW",
        "summary": "Timer initialization in BackgroundHangThread::NotifyActivity adds very high overhead to task handling",
        "op_sys": "Unspecified"
      },
      {
        "summary": ">120% CPU load on https://web.arbeitsagentur.de/ausbildungssuche/ when scrolling through the page",
        "op_sys": "Unspecified",
        "priority": "--",
        "keywords": [
          "perf",
          "perf:resource-use",
          "power",
          "reproducible"
        ],
        "status": "NEW",
        "severity": "--",
        "component": "Layout",
        "creation_time": "2022-12-09T13:43:57Z",
        "last_change_time": "2024-04-08T16:37:18Z",
        "id": 1804893
      },
      {
        "severity": "S3",
        "last_change_time": "2025-05-23T13:44:34Z",
        "id": 1805255,
        "creation_time": "2022-12-12T19:01:50Z",
        "component": "Performance: General",
        "summary": "Firefox has 50% more soft page faults than Chrome running Speedometer 2",
        "op_sys": "Unspecified",
        "status": "NEW",
        "keywords": [],
        "priority": "--"
      },
      {
        "op_sys": "Unspecified",
        "summary": "The memory used by the Privileged Content process increases by about 5MB every 5 minutes",
        "priority": "P3",
        "keywords": [],
        "status": "NEW",
        "severity": "S3",
        "id": 1805460,
        "last_change_time": "2023-06-05T23:18:33Z",
        "creation_time": "2022-12-13T16:24:36Z",
        "component": "New Tab Page"
      },
      {
        "summary": "Higher GPU usage in Google Meet than in Chrome",
        "op_sys": "Unspecified",
        "status": "NEW",
        "priority": "--",
        "keywords": [],
        "severity": "S3",
        "component": "Graphics: WebRender",
        "creation_time": "2022-12-15T21:11:40Z",
        "last_change_time": "2025-03-11T08:56:42Z",
        "id": 1805999
      },
      {
        "op_sys": "Linux",
        "summary": "[Snap] nsIShellService.isDefaultBrowser is slow and called 3 times during startup",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:startup",
          "reproducible"
        ],
        "severity": "--",
        "component": "Widget: Gtk",
        "creation_time": "2022-12-22T19:36:30Z",
        "last_change_time": "2023-07-11T17:17:27Z",
        "id": 1807070
      },
      {
        "status": "NEW",
        "priority": "--",
        "keywords": [],
        "summary": "Don't reinit fragments and reinflate layouts to reduce power usage",
        "op_sys": "Android",
        "id": 1807310,
        "last_change_time": "2025-12-10T10:55:12Z",
        "creation_time": "2022-12-23T20:41:16Z",
        "component": "Performance",
        "severity": "S2"
      },
      {
        "op_sys": "Android",
        "summary": "Avoid multiple layouts to improve power usage caused by suspending observer updates",
        "status": "NEW",
        "keywords": [],
        "priority": "P3",
        "severity": "S3",
        "last_change_time": "2025-03-11T07:55:40Z",
        "id": 1807311,
        "creation_time": "2022-12-23T20:41:24Z",
        "component": "Performance"
      },
      {
        "component": "Performance",
        "creation_time": "2022-12-23T20:41:46Z",
        "last_change_time": "2023-12-05T21:58:33Z",
        "id": 1807312,
        "severity": "S3",
        "status": "NEW",
        "priority": "--",
        "keywords": [],
        "summary": "Gecko resizes when keyboard dismissed by tapping the page",
        "op_sys": "Android"
      },
      {
        "summary": "Performance experiment: create the speculative gecko session sooner to improve applink (view) startup",
        "op_sys": "Android",
        "status": "NEW",
        "priority": "--",
        "keywords": [],
        "severity": "S3",
        "creation_time": "2022-12-23T20:41:53Z",
        "component": "Performance",
        "last_change_time": "2023-12-05T21:58:55Z",
        "id": 1807313
      },
      {
        "id": 1807315,
        "last_change_time": "2025-03-11T08:25:04Z",
        "creation_time": "2022-12-23T20:42:15Z",
        "component": "Performance",
        "severity": "S3",
        "priority": "P4",
        "keywords": [],
        "status": "NEW",
        "op_sys": "Android",
        "summary": "On start up, ensure first network request is page load"
      },
      {
        "component": "Performance",
        "creation_time": "2022-12-23T20:43:00Z",
        "last_change_time": "2023-12-05T21:59:07Z",
        "id": 1807316,
        "severity": "S3",
        "keywords": [],
        "priority": "--",
        "status": "NEW",
        "op_sys": "Android",
        "summary": "The speculative gecko session does not appear to be created prior to the WARM VIEW scenario"
      },
      {
        "op_sys": "Android",
        "summary": "Up to 8 network requests occur before target url in COLD VIEW start up",
        "keywords": [],
        "priority": "--",
        "status": "NEW",
        "severity": "S3",
        "component": "Performance",
        "creation_time": "2022-12-23T20:44:16Z",
        "id": 1807323,
        "last_change_time": "2023-12-05T22:00:52Z"
      },
      {
        "last_change_time": "2023-12-05T22:01:26Z",
        "id": 1807328,
        "creation_time": "2022-12-23T20:44:53Z",
        "component": "Performance",
        "severity": "S3",
        "priority": "--",
        "keywords": [],
        "status": "NEW",
        "summary": "Opening homescreen shortcuts takes noticeably longer than opening the app icon",
        "op_sys": "Android"
      },
      {
        "keywords": [],
        "priority": "--",
        "status": "NEW",
        "summary": "Scrolling renders at 60 fps on a 90 Hz displays with Nightly (and Focus)",
        "op_sys": "Android",
        "last_change_time": "2025-03-11T08:56:40Z",
        "id": 1807329,
        "component": "Performance",
        "creation_time": "2022-12-23T20:45:05Z",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "component": "Performance",
        "creation_time": "2022-12-23T20:47:41Z",
        "last_change_time": "2025-12-24T12:14:09Z",
        "id": 1807337,
        "summary": "Taking a screenshot on the main thread delays tabs tray from opening for ~178ms",
        "op_sys": "Android",
        "status": "NEW",
        "priority": "--",
        "keywords": []
      },
      {
        "creation_time": "2022-12-23T20:47:51Z",
        "component": "Performance",
        "last_change_time": "2023-12-05T22:06:11Z",
        "id": 1807338,
        "severity": "S3",
        "priority": "--",
        "keywords": [],
        "status": "NEW",
        "summary": "260-524ms between HomeActivity.load and GeckoSession.load when entered hitting enter on search",
        "op_sys": "Android"
      },
      {
        "summary": "Search suggestions block 64-130ms on UI transitions before fetching when typing characters in the awesome screen",
        "op_sys": "Android",
        "priority": "--",
        "keywords": [],
        "status": "NEW",
        "severity": "S3",
        "last_change_time": "2023-12-05T22:07:04Z",
        "id": 1807341,
        "component": "Performance",
        "creation_time": "2022-12-23T20:49:08Z"
      },
      {
        "op_sys": "Android",
        "summary": "`SuggestionFetcher.fetch` is called on empty text when url bar is pressed",
        "keywords": [],
        "priority": "P2",
        "status": "NEW",
        "severity": "S3",
        "last_change_time": "2023-12-05T22:08:07Z",
        "id": 1807343,
        "creation_time": "2022-12-23T20:49:33Z",
        "component": "Performance"
      },
      {
        "status": "NEW",
        "keywords": [],
        "priority": "--",
        "summary": "2s+ between hitting PWA app icon and displaying an content (white screen) from the app",
        "op_sys": "Android",
        "creation_time": "2022-12-23T20:49:47Z",
        "component": "Performance",
        "last_change_time": "2024-08-30T17:46:41Z",
        "id": 1807344,
        "severity": "S4"
      },
      {
        "keywords": [
          "perf:responsiveness",
          "reproducible"
        ],
        "priority": "P5",
        "status": "NEW",
        "summary": "Editing a custom search engine has slow response on Save",
        "op_sys": "Android",
        "last_change_time": "2024-04-17T19:37:32Z",
        "id": 1807708,
        "component": "Search",
        "creation_time": "2022-12-27T21:12:56Z",
        "severity": "S4"
      },
      {
        "severity": "S3",
        "last_change_time": "2025-05-13T12:29:19Z",
        "id": 1810370,
        "component": "General",
        "creation_time": "2023-01-15T17:00:52Z",
        "summary": "Focus gives a \"running in the background\" notification in Task Switcher and uses lots of CPU in background",
        "op_sys": "Android",
        "keywords": [
          "perf:pageload",
          "perf:resource-use"
        ],
        "priority": "--",
        "status": "NEW"
      },
      {
        "severity": "S3",
        "id": 1813248,
        "last_change_time": "2023-12-05T22:16:45Z",
        "component": "Performance",
        "creation_time": "2023-01-27T23:26:43Z",
        "op_sys": "Android",
        "summary": "Glean code adds ~61ms on COLD start up, all types",
        "priority": "--",
        "keywords": [],
        "status": "NEW"
      },
      {
        "priority": "--",
        "keywords": [],
        "status": "NEW",
        "op_sys": "Android",
        "summary": "Firefox does not load any site for few seconds after switching back and forth between apps",
        "creation_time": "2023-01-30T19:47:21Z",
        "component": "Performance",
        "last_change_time": "2026-02-11T13:21:28Z",
        "id": 1813710,
        "severity": "S3"
      },
      {
        "severity": "S4",
        "component": "Performance",
        "creation_time": "2023-01-31T16:24:00Z",
        "id": 1814129,
        "last_change_time": "2024-01-12T02:46:42Z",
        "summary": "Debug build crashes at startup on older devices",
        "op_sys": "Android",
        "priority": "P3",
        "keywords": [],
        "status": "NEW"
      },
      {
        "op_sys": "Unspecified",
        "summary": "WorkerNavigator::GetUserAgent does a sync-loop call to the main thread",
        "status": "NEW",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P3",
        "severity": "S3",
        "component": "DOM: Workers",
        "creation_time": "2023-02-14T12:25:02Z",
        "last_change_time": "2024-11-08T19:53:32Z",
        "id": 1816657
      },
      {
        "severity": "N/A",
        "last_change_time": "2025-05-15T20:04:28Z",
        "id": 1816678,
        "component": "Performance: General",
        "creation_time": "2023-02-14T14:05:00Z",
        "op_sys": "All",
        "summary": "[meta] Determine what improvements we can make to our use and measurement of speculative connect",
        "keywords": [
          "meta"
        ],
        "priority": "P2",
        "status": "NEW"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf:animation",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "op_sys": "Linux",
        "summary": "Jank when grabbing and dragging carousel",
        "creation_time": "2023-02-23T01:36:24Z",
        "component": "Graphics: WebRender",
        "id": 1818402,
        "last_change_time": "2024-04-03T02:33:21Z",
        "severity": "S3"
      },
      {
        "severity": "--",
        "id": 1818835,
        "last_change_time": "2024-11-09T14:11:50Z",
        "creation_time": "2023-02-24T22:56:53Z",
        "component": "Performance",
        "summary": "Enhancement with Huawei and some hardware.",
        "op_sys": "Android",
        "priority": "--",
        "keywords": [],
        "status": "NEW"
      },
      {
        "summary": "High CPU/GPU usage on website https://openbb.co/",
        "op_sys": "macOS",
        "status": "NEW",
        "priority": "--",
        "keywords": [
          "perf:resource-use"
        ],
        "severity": "--",
        "creation_time": "2023-03-07T18:19:18Z",
        "component": "Performance: General",
        "last_change_time": "2023-03-09T18:16:26Z",
        "id": 1820840
      },
      {
        "op_sys": "Unspecified",
        "summary": "Cancel remaining timers when http connections are all resolved",
        "status": "NEW",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3",
        "severity": "N/A",
        "last_change_time": "2025-01-15T21:56:29Z",
        "id": 1821691,
        "creation_time": "2023-03-10T15:27:13Z",
        "component": "Networking: HTTP"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Memory Leak (Isolated Web Container)",
        "status": "NEW",
        "keywords": [],
        "priority": "--",
        "severity": "S3",
        "creation_time": "2023-03-24T10:37:54Z",
        "component": "Performance: Memory",
        "id": 1824332,
        "last_change_time": "2025-05-23T13:32:18Z"
      },
      {
        "severity": "S4",
        "component": "Networking: HTTP",
        "creation_time": "2023-03-27T05:33:08Z",
        "id": 1824651,
        "last_change_time": "2025-06-12T12:12:04Z",
        "op_sys": "Unspecified",
        "summary": "Brotli layered compression halts browser",
        "priority": "P2",
        "keywords": [
          "csectype-dos",
          "hang",
          "perf",
          "reporter-external",
          "sec-low"
        ],
        "status": "NEW"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Firefox takes much longer to complete a history-deletion operation, if the user presses and holds `Del` key (instead of pressing once), with lots of history entries selected",
        "status": "NEW",
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "severity": "S3",
        "component": "Places",
        "creation_time": "2023-03-28T00:04:31Z",
        "last_change_time": "2025-03-11T07:54:44Z",
        "id": 1824872
      },
      {
        "status": "NEW",
        "priority": "--",
        "keywords": [
          "nightly-community",
          "perf:responsiveness",
          "reproducible"
        ],
        "op_sys": "Unspecified",
        "summary": "flightaware.com page becomes insensitive to user input/links cannot be navigated to when loading",
        "id": 1825084,
        "last_change_time": "2025-11-07T07:19:20Z",
        "component": "Performance: Responsiveness",
        "creation_time": "2023-03-28T18:35:07Z",
        "severity": "S3"
      },
      {
        "keywords": [
          "perf:animation",
          "perf:resource-use"
        ],
        "priority": "P3",
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "Very high memory usage on Zenni Optical's website",
        "component": "Performance: Memory",
        "creation_time": "2023-05-05T03:49:37Z",
        "id": 1831458,
        "last_change_time": "2025-04-24T22:13:38Z",
        "severity": "S3"
      },
      {
        "op_sys": "macOS",
        "summary": "Canvas drawing outside requestAnimationFrame callbacks leads to overproduction (needs more backpressure) - paints become slower and slower",
        "priority": "--",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW",
        "severity": "S3",
        "last_change_time": "2024-02-21T08:39:22Z",
        "id": 1831609,
        "creation_time": "2023-05-05T16:47:25Z",
        "component": "Graphics: Canvas2D"
      },
      {
        "priority": "--",
        "keywords": [
          "perf:animation",
          "perf:responsiveness"
        ],
        "status": "NEW",
        "op_sys": "Linux",
        "summary": "sinerider.com is slow",
        "creation_time": "2023-05-17T12:21:40Z",
        "component": "Graphics: Canvas2D",
        "id": 1833620,
        "last_change_time": "2023-08-05T00:48:45Z",
        "severity": "S4"
      },
      {
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "main-thread-io",
          "perf:startup",
          "reproducible"
        ],
        "summary": "In automation, add-on manager in msix builds spend ~400ms or more on startup doing mainthread IO `stat` calls on every language pack we ship to get the last modified date of all of them (and then uninstalls all of them!?)",
        "op_sys": "All",
        "last_change_time": "2024-01-29T21:54:50Z",
        "id": 1833831,
        "component": "Add-ons Manager",
        "creation_time": "2023-05-18T09:10:01Z",
        "severity": "N/A"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Large fetch in Web Worker in extension causes hang in Firefox extension process",
        "keywords": [
          "perf:resource-use",
          "perf:responsiveness",
          "regression",
          "reproducible"
        ],
        "priority": "P3",
        "status": "NEW",
        "severity": "S3",
        "creation_time": "2023-05-23T13:01:29Z",
        "component": "JavaScript: GC",
        "id": 1834526,
        "last_change_time": "2025-03-07T12:16:59Z"
      },
      {
        "op_sys": "Android",
        "summary": "www.boredpanda.com - Homescreen app is laggy when installed to the home screen",
        "status": "NEW",
        "keywords": [
          "perf:pageload",
          "perf:resource-use",
          "perf:responsiveness",
          "reproducible"
        ],
        "priority": "P3",
        "severity": "S3",
        "id": 1834706,
        "last_change_time": "2024-05-14T21:29:08Z",
        "component": "General",
        "creation_time": "2023-05-24T08:10:15Z"
      },
      {
        "creation_time": "2023-05-24T09:20:14Z",
        "component": "Performance",
        "id": 1834720,
        "last_change_time": "2023-06-23T20:26:51Z",
        "severity": "--",
        "keywords": [],
        "priority": "--",
        "status": "NEW",
        "summary": "Address bar is slow on Android (compared to Chrome)",
        "op_sys": "Android"
      },
      {
        "status": "NEW",
        "keywords": [],
        "priority": "P2",
        "op_sys": "Android",
        "summary": "Firefox 113.2.0 at Android 13. Audio and video stutter when using bluetooth output.",
        "component": "Audio/Video: Playback",
        "creation_time": "2023-05-31T08:02:46Z",
        "last_change_time": "2026-01-21T15:36:38Z",
        "id": 1835986,
        "severity": "S3"
      },
      {
        "creation_time": "2023-06-01T15:17:18Z",
        "component": "New Tab Page",
        "last_change_time": "2023-06-09T14:24:13Z",
        "id": 1836300,
        "severity": "S3",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "op_sys": "Unspecified",
        "summary": "CPU spike when new tab page has many rows of icons"
      },
      {
        "creation_time": "2023-06-09T01:17:11Z",
        "component": "Audio/Video: Playback",
        "id": 1837553,
        "last_change_time": "2024-09-01T18:54:49Z",
        "severity": "S3",
        "priority": "--",
        "keywords": [
          "memory-leak",
          "perf:resource-use"
        ],
        "status": "NEW",
        "summary": "KDE X11/Mesa 23.1.1/Radeon RX 580: 5GB memory leak (heap-unclassified) in RDD process when scrolling on Youtube Shorts",
        "op_sys": "Linux"
      },
      {
        "priority": "--",
        "keywords": [
          "perf:responsiveness",
          "reproducible"
        ],
        "status": "NEW",
        "summary": "Jank when a window with many tabs becomes active/inactive, due to restyling all the tabs to account for GTK-theme-imposed tab-title text color change (e.g. grayed-out text for inactive window)",
        "op_sys": "Linux",
        "component": "Widget: Gtk",
        "creation_time": "2023-06-11T19:24:03Z",
        "id": 1837871,
        "last_change_time": "2023-07-01T10:07:59Z",
        "severity": "S3"
      },
      {
        "last_change_time": "2024-10-08T13:29:24Z",
        "id": 1838448,
        "component": "Storage",
        "creation_time": "2023-06-14T14:37:10Z",
        "severity": "S3",
        "priority": "--",
        "keywords": [
          "perf:resource-use",
          "perf:responsiveness",
          "regression"
        ],
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "CPU usage in StructuredCloneHolder.deserialize starting version 115 far higher than in 114 with Dashlane extension"
      },
      {
        "op_sys": "Unspecified",
        "summary": "TransmitPermissionsAndCookiesAndBlobURLsForPrincipalInfo blocks the main thread",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:pageload",
          "perf:resource-use",
          "perf:responsiveness"
        ],
        "severity": "S3",
        "id": 1839322,
        "last_change_time": "2026-02-19T15:51:33Z",
        "component": "DOM: File",
        "creation_time": "2023-06-20T08:58:55Z"
      },
      {
        "severity": "S3",
        "component": "File Handling",
        "creation_time": "2023-06-30T03:07:23Z",
        "id": 1841207,
        "last_change_time": "2023-07-28T16:54:46Z",
        "summary": "The download button is unresponsive while saving a HTML page with 4000 CSS files",
        "op_sys": "Unspecified",
        "status": "NEW",
        "keywords": [
          "perf"
        ],
        "priority": "P3"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3",
        "summary": "Three seconds of CPU work during startup in mozilla::safebrowsing::ProtocolParserProtobuf::ProcessEncodedAddition and mozilla::safebrowsing::Classifier::UpdateTableV4",
        "op_sys": "All",
        "id": 1842079,
        "last_change_time": "2024-04-17T10:46:30Z",
        "component": "Safe Browsing",
        "creation_time": "2023-07-06T20:07:26Z",
        "severity": "N/A"
      },
      {
        "op_sys": "Windows 10",
        "summary": "Huge memory and CPU usage on https://jp.mercari.com/",
        "priority": "P4",
        "keywords": [
          "nightly-community"
        ],
        "status": "NEW",
        "severity": "S3",
        "id": 1843821,
        "last_change_time": "2025-05-23T13:32:12Z",
        "creation_time": "2023-07-17T03:51:04Z",
        "component": "Performance: Memory"
      },
      {
        "summary": "Animated clouds on http://www.wdrmaus.de use around 60% CPU and GPU load",
        "op_sys": "Unspecified",
        "status": "NEW",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "--",
        "severity": "--",
        "creation_time": "2023-07-31T19:26:23Z",
        "component": "Performance: General",
        "id": 1846333,
        "last_change_time": "2023-12-04T12:25:36Z"
      },
      {
        "id": 1852332,
        "last_change_time": "2024-05-06T18:44:26Z",
        "creation_time": "2023-09-08T19:13:50Z",
        "component": "Browser Engine",
        "severity": "S3",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "--",
        "status": "NEW",
        "op_sys": "All",
        "summary": "parallax page lags out browser and scrolling"
      },
      {
        "summary": "Hangs on pages with huge (many thousands) number of links, mostly due to building large IPC messages and HashSets",
        "op_sys": "Unspecified",
        "status": "NEW",
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "severity": "S3",
        "id": 1854770,
        "last_change_time": "2025-06-12T23:03:20Z",
        "component": "Places",
        "creation_time": "2023-09-23T05:17:21Z"
      },
      {
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:resource-use"
        ],
        "op_sys": "Windows 10",
        "summary": "Higher RAM usage compared to Chrome when a background video trailer plays at hulu.com",
        "component": "Audio/Video",
        "creation_time": "2023-11-10T13:16:24Z",
        "id": 1864166,
        "last_change_time": "2025-03-20T16:04:12Z",
        "severity": "S3"
      },
      {
        "status": "NEW",
        "priority": "--",
        "keywords": [
          "perf:resource-use"
        ],
        "op_sys": "Unspecified",
        "summary": "60% CPU usage of content process because of memory leak in gc-heap on Amazon product page",
        "component": "Performance: General",
        "creation_time": "2023-11-28T16:56:15Z",
        "last_change_time": "2025-05-23T13:44:33Z",
        "id": 1867074,
        "severity": "S3"
      },
      {
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "--",
        "status": "NEW",
        "summary": "Memory leak and high CPU consumption at marketwatch.com",
        "op_sys": "Windows 10",
        "creation_time": "2023-12-06T19:59:29Z",
        "component": "Performance: Memory",
        "last_change_time": "2025-09-24T20:01:57Z",
        "id": 1868643,
        "severity": "S3"
      },
      {
        "summary": "Infinte recursing when selecting text on cbtnuggets.com",
        "op_sys": "Unspecified",
        "status": "NEW",
        "keywords": [
          "perf:responsiveness",
          "reproducible",
          "webcompat:needs-diagnosis"
        ],
        "priority": "P3",
        "severity": "S3",
        "component": "Site Reports",
        "creation_time": "2023-12-13T01:02:22Z",
        "id": 1869680,
        "last_change_time": "2026-02-05T15:46:26Z"
      },
      {
        "severity": "S3",
        "last_change_time": "2024-04-02T20:48:12Z",
        "id": 1872944,
        "creation_time": "2024-01-03T23:54:42Z",
        "component": "Graphics: WebRender",
        "summary": "High resource usage during video playback on hyprland.org",
        "op_sys": "Windows",
        "status": "NEW",
        "keywords": [],
        "priority": "--"
      },
      {
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "Slow (single-threaded) PDF rendering for documents with lots of vector shapes",
        "creation_time": "2024-01-19T22:07:59Z",
        "component": "PDF Viewer",
        "id": 1875547,
        "last_change_time": "2025-01-24T12:30:14Z",
        "severity": "S3"
      },
      {
        "summary": "PDF takes excessively long to render",
        "op_sys": "All",
        "status": "NEW",
        "priority": "--",
        "keywords": [
          "perf:pageload",
          "reproducible"
        ],
        "severity": "S3",
        "last_change_time": "2026-02-09T12:52:29Z",
        "id": 1878133,
        "component": "Graphics: Canvas2D",
        "creation_time": "2024-02-01T20:24:40Z"
      },
      {
        "id": 1879269,
        "last_change_time": "2024-05-09T16:23:37Z",
        "component": "Graphics",
        "creation_time": "2024-02-08T08:43:31Z",
        "severity": "S3",
        "status": "NEW",
        "priority": "--",
        "keywords": [
          "perf:responsiveness"
        ],
        "summary": "Slow animation and scrolling on multiplayer.it",
        "op_sys": "Unspecified"
      },
      {
        "summary": "Tab preview from dragging appears to use software rendering and blocks both content-process and parent process",
        "op_sys": "Windows",
        "keywords": [],
        "priority": "P2",
        "status": "NEW",
        "severity": "S3",
        "id": 1880794,
        "last_change_time": "2024-10-03T00:34:06Z",
        "component": "Graphics",
        "creation_time": "2024-02-19T09:20:23Z"
      },
      {
        "op_sys": "macOS",
        "summary": "Don't show drag and drop previews for very large images",
        "status": "NEW",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "--",
        "severity": "--",
        "id": 1881248,
        "last_change_time": "2025-07-17T12:04:02Z",
        "component": "Performance: Responsiveness",
        "creation_time": "2024-02-21T13:57:16Z"
      },
      {
        "keywords": [
          "perf:animation",
          "perf:responsiveness"
        ],
        "priority": "P2",
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "Very low framerate on https://www.mozilla.ai/ when at the top of the page",
        "id": 1881384,
        "last_change_time": "2024-05-09T17:04:46Z",
        "component": "Graphics",
        "creation_time": "2024-02-22T02:13:59Z",
        "severity": "S3"
      },
      {
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "NEW",
        "summary": "Demo that takes png snapshots of canvas and saves to disk (using large data URIs), takes considerable amount of time on parent process",
        "op_sys": "Windows",
        "last_change_time": "2024-10-11T07:09:25Z",
        "id": 1882699,
        "component": "Downloads API",
        "creation_time": "2024-02-29T06:52:29Z",
        "severity": "S3"
      },
      {
        "id": 1887129,
        "last_change_time": "2026-02-05T15:48:39Z",
        "component": "Performance",
        "creation_time": "2024-03-22T18:58:09Z",
        "severity": "S3",
        "keywords": [
          "webcompat:platform-bug",
          "webcompat:site-report"
        ],
        "priority": "P3",
        "status": "NEW",
        "summary": "Slow responses on trivia game (thrice) in Fenix Nightly vs. Chrome on same device & network connection",
        "op_sys": "Android"
      },
      {
        "summary": "URL.searchParams performance issue",
        "op_sys": "Unspecified",
        "status": "NEW",
        "keywords": [],
        "priority": "P3",
        "severity": "N/A",
        "creation_time": "2024-03-26T22:56:35Z",
        "component": "DOM: Networking",
        "id": 1887997,
        "last_change_time": "2024-04-23T14:52:50Z"
      },
      {
        "summary": "The font dialog flickers when it is initially populated",
        "op_sys": "Unspecified",
        "status": "NEW",
        "keywords": [
          "perf:frontend"
        ],
        "priority": "P3",
        "severity": "S4",
        "id": 1889445,
        "last_change_time": "2025-08-10T21:30:09Z",
        "component": "Settings UI",
        "creation_time": "2024-04-03T17:52:02Z"
      },
      {
        "severity": "S3",
        "last_change_time": "2025-10-10T06:12:55Z",
        "id": 1889621,
        "creation_time": "2024-04-04T13:05:56Z",
        "component": "Networking: HTTP",
        "op_sys": "Unspecified",
        "summary": "A repeating 1h \"nsHttpConnectionMgr\" timer fires while GeckoView example is completely idle",
        "priority": "P2",
        "keywords": [
          "perf:resource-use"
        ],
        "status": "NEW"
      },
      {
        "severity": "S3",
        "creation_time": "2024-04-04T13:57:40Z",
        "component": "Performance",
        "id": 1889648,
        "last_change_time": "2025-10-10T06:13:26Z",
        "summary": "Fenix restarts itself soon after getting killed by the user",
        "op_sys": "Android",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "--",
        "status": "NEW"
      },
      {
        "op_sys": "Linux",
        "summary": "Bug Report - Scrolling lags on about:preferences in Firefox Snap (lubuntu 24.04 alpha)",
        "status": "NEW",
        "keywords": [
          "perf:animation",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "severity": "--",
        "last_change_time": "2024-10-01T10:35:18Z",
        "id": 1892850,
        "creation_time": "2024-04-23T01:05:15Z",
        "component": "Widget: Gtk"
      },
      {
        "summary": "Massive jank when scrolling https://frontendmasters.com/blog/the-view-transition-api/",
        "op_sys": "Linux",
        "priority": "--",
        "keywords": [
          "perf:animation",
          "perf:responsiveness"
        ],
        "status": "NEW",
        "severity": "S3",
        "creation_time": "2024-04-28T22:34:26Z",
        "component": "Graphics: WebRender",
        "last_change_time": "2026-01-01T13:54:55Z",
        "id": 1893904
      },
      {
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:responsiveness",
          "regression",
          "reproducible"
        ],
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "Tab switches to/from tabs with tab-specific infobars cause viewport height to change, resulting in layout jank",
        "id": 1894194,
        "last_change_time": "2026-02-16T11:47:50Z",
        "component": "Toolbars and Customization",
        "creation_time": "2024-04-30T10:03:38Z",
        "severity": "S3"
      },
      {
        "severity": "S4",
        "component": "Panning and Zooming",
        "creation_time": "2024-05-25T16:13:00Z",
        "last_change_time": "2025-11-07T07:19:15Z",
        "id": 1898878,
        "op_sys": "Android",
        "summary": "Scrolling stutters on store.steampowered.com",
        "status": "NEW",
        "priority": "P5",
        "keywords": [
          "perf:animation",
          "perf:responsiveness",
          "reproducible"
        ]
      },
      {
        "summary": "Higher CPU use than Chrome on twitch.tv",
        "op_sys": "Unspecified",
        "status": "NEW",
        "keywords": [
          "perf:resource-use",
          "top50"
        ],
        "priority": "--",
        "severity": "S3",
        "id": 1900288,
        "last_change_time": "2024-06-27T18:34:28Z",
        "component": "Audio/Video",
        "creation_time": "2024-06-03T02:10:03Z"
      },
      {
        "last_change_time": "2025-05-07T09:32:00Z",
        "id": 1900989,
        "creation_time": "2024-06-06T11:30:10Z",
        "component": "Tabbed Browser",
        "severity": "S4",
        "status": "NEW",
        "priority": "P3",
        "keywords": [],
        "op_sys": "Unspecified",
        "summary": "unloadNonRequiredTabs/this.unloadTimer<[AsyncTabSwitcher.sys.mjs]:JS fires every 300ms"
      },
      {
        "last_change_time": "2025-11-07T07:16:03Z",
        "id": 1902812,
        "component": "Graphics: WebRender",
        "creation_time": "2024-06-15T03:51:42Z",
        "severity": "S3",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "--",
        "status": "NEW",
        "summary": "Jank when scrolling article",
        "op_sys": "Linux"
      },
      {
        "summary": "Unable to re-arrange tabs while unzipping files using the drag and drop feature",
        "op_sys": "Unspecified",
        "status": "NEW",
        "priority": "--",
        "keywords": [],
        "severity": "S3",
        "creation_time": "2024-07-12T09:47:06Z",
        "component": "Performance: General",
        "last_change_time": "2024-09-06T04:01:38Z",
        "id": 1907530
      },
      {
        "status": "NEW",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3",
        "op_sys": "Windows 10",
        "summary": "www.syncfusion.com - High CPU and memory usage with zoom set to 110% when opening links in new tabs",
        "last_change_time": "2024-07-29T13:43:40Z",
        "id": 1910093,
        "creation_time": "2024-07-26T12:27:37Z",
        "component": "Performance: General",
        "severity": "S3"
      },
      {
        "op_sys": "Linux",
        "summary": "High CPU usage on xiaohongshu.com, page slow warning",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness",
          "reproducible"
        ],
        "severity": "S3",
        "id": 1917293,
        "last_change_time": "2024-12-17T18:53:47Z",
        "component": "JavaScript Engine: JIT",
        "creation_time": "2024-09-06T15:23:08Z"
      },
      {
        "keywords": [
          "perf:responsiveness",
          "reproducible"
        ],
        "priority": "--",
        "status": "NEW",
        "summary": "controld.com - Blank section for a few seconds when scrolling past \"Standard Configurations\"",
        "op_sys": "Android",
        "creation_time": "2024-09-10T07:53:03Z",
        "component": "Graphics: WebRender",
        "id": 1917774,
        "last_change_time": "2025-01-07T01:31:55Z",
        "severity": "S4"
      },
      {
        "status": "NEW",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P3",
        "op_sys": "Windows 10",
        "summary": "chrconnect.telushealth.com - Navigation on the page is laggy/slow, readback during createImageBitmap",
        "id": 1922769,
        "last_change_time": "2024-10-29T01:00:16Z",
        "creation_time": "2024-10-04T10:45:32Z",
        "component": "Graphics: Canvas2D",
        "severity": "S3"
      },
      {
        "severity": "S4",
        "component": "JavaScript Engine",
        "creation_time": "2024-10-17T12:58:07Z",
        "id": 1925271,
        "last_change_time": "2026-01-30T08:24:36Z",
        "op_sys": "Windows 10",
        "summary": "eaglercraftx1-8.github.io - Game is lagging",
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "webcompat:site-report"
        ]
      },
      {
        "summary": "etoland.co.kr - Page elements take longer to load",
        "op_sys": "Windows 10",
        "priority": "--",
        "keywords": [],
        "status": "NEW",
        "severity": "S3",
        "component": "Performance: General",
        "creation_time": "2024-10-24T14:01:03Z",
        "id": 1926871,
        "last_change_time": "2025-06-13T17:42:07Z"
      },
      {
        "keywords": [],
        "priority": "P3",
        "status": "NEW",
        "op_sys": "Windows 10",
        "summary": "map.epfl.ch - Laggy when trying to navigate on the map",
        "id": 1927084,
        "last_change_time": "2024-12-26T13:52:49Z",
        "component": "Graphics: Canvas2D",
        "creation_time": "2024-10-25T09:55:43Z",
        "severity": "S3"
      },
      {
        "summary": "Jira button animations cause sustained high Firefox CPU usage",
        "op_sys": "Unspecified",
        "keywords": [],
        "priority": "--",
        "status": "NEW",
        "severity": "S3",
        "component": "Graphics: WebRender",
        "creation_time": "2024-11-05T23:33:58Z",
        "id": 1929443,
        "last_change_time": "2025-12-11T07:44:07Z"
      },
      {
        "severity": "S3",
        "component": "Performance: General",
        "creation_time": "2024-11-18T03:03:28Z",
        "id": 1931792,
        "last_change_time": "2025-05-23T13:44:36Z",
        "summary": "Codepen demo (https://codepen.io/tfrere/pen/yLmZELm?editors=0010) has constant increase in memory and periodically spends multiple-seconds in CC on Nightly",
        "op_sys": "Unspecified",
        "status": "NEW",
        "priority": "--",
        "keywords": []
      },
      {
        "severity": "S3",
        "component": "Installer",
        "creation_time": "2024-11-24T23:22:22Z",
        "last_change_time": "2025-02-12T16:57:37Z",
        "id": 1933102,
        "op_sys": "Windows 10",
        "summary": "Stuck WDBA holds profile lock, delays startup by 5s",
        "status": "NEW",
        "keywords": [
          "perf:startup"
        ],
        "priority": "P3"
      },
      {
        "status": "NEW",
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "summary": "Scrolling in the detailed \"History\" window leads to 1GB memory use (repeated favicons?). Subsequent CycleCollection hangs the parent-process for 13s.",
        "op_sys": "Unspecified",
        "creation_time": "2024-12-15T13:55:47Z",
        "component": "Places",
        "id": 1937398,
        "last_change_time": "2025-03-31T14:20:24Z",
        "severity": "S3"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Slow script warning and checkerboarding on heavy redash page",
        "keywords": [],
        "priority": "--",
        "status": "NEW",
        "severity": "S3",
        "id": 1938239,
        "last_change_time": "2025-05-23T13:44:29Z",
        "component": "Performance: General",
        "creation_time": "2024-12-18T22:26:34Z"
      },
      {
        "creation_time": "2024-12-22T13:03:23Z",
        "component": "Performance: General",
        "id": 1938809,
        "last_change_time": "2025-08-05T15:08:14Z",
        "severity": "S3",
        "keywords": [],
        "priority": "--",
        "status": "NEW",
        "summary": "Page can spend 12 seconds around CC on a page with large number of images/icons/SVGs and large time in StyleImageRequestCleanupTask",
        "op_sys": "Unspecified"
      },
      {
        "severity": "S3",
        "component": "DOM: Copy & Paste and Drag & Drop",
        "creation_time": "2025-01-09T07:23:53Z",
        "last_change_time": "2026-01-07T18:39:48Z",
        "id": 1940667,
        "summary": "30s of jank on parent-process doing something around getFixupURIInfo and ContentAreaDropListener.sys.mjs (resource://gre/modules/URIFixup.sys.mjs:278:18)",
        "op_sys": "Unspecified",
        "priority": "--",
        "keywords": [
          "regression"
        ],
        "status": "NEW"
      },
      {
        "severity": "S3",
        "last_change_time": "2026-01-07T18:42:20Z",
        "id": 1942031,
        "creation_time": "2025-01-16T11:14:32Z",
        "component": "Graphics: Canvas2D",
        "summary": "Bad canvas performance on this example (nokiadesignarchive.aalto.fi)",
        "op_sys": "All",
        "status": "NEW",
        "priority": "--",
        "keywords": [
          "perf",
          "perf:responsiveness",
          "regression"
        ]
      },
      {
        "op_sys": "Unspecified",
        "summary": "Loading delibs.com/cd74 with a spoofed Chrome UA causes massive jank",
        "keywords": [
          "perf:responsiveness",
          "reproducible"
        ],
        "priority": "P3",
        "status": "NEW",
        "severity": "S3",
        "component": "Performance: Responsiveness",
        "creation_time": "2025-01-20T16:29:10Z",
        "id": 1942652,
        "last_change_time": "2025-05-27T15:03:11Z"
      },
      {
        "summary": "Nightly became extremely janky after applying updates over the past week",
        "op_sys": "Unspecified",
        "status": "NEW",
        "priority": "--",
        "keywords": [],
        "severity": "S3",
        "component": "Performance: General",
        "creation_time": "2025-01-21T19:15:10Z",
        "id": 1942894,
        "last_change_time": "2025-05-23T13:44:28Z"
      },
      {
        "keywords": [],
        "priority": "P3",
        "status": "NEW",
        "summary": "Noticeable slowdown in opening the \"History\" menu bar after visiting the squig.link site (probably due to the favicon)",
        "op_sys": "macOS",
        "last_change_time": "2025-03-31T17:36:57Z",
        "id": 1943625,
        "component": "Widget: Cocoa",
        "creation_time": "2025-01-24T16:40:36Z",
        "severity": "S3"
      },
      {
        "keywords": [
          "webcompat:needs-diagnosis"
        ],
        "priority": "--",
        "status": "NEW",
        "op_sys": "Linux",
        "summary": "www.kiwico.com - Checkout page becomes unresponsive",
        "creation_time": "2025-02-24T12:05:34Z",
        "component": "Performance: General",
        "id": 1950073,
        "last_change_time": "2026-01-07T19:01:21Z",
        "severity": "--"
      },
      {
        "creation_time": "2025-02-27T11:15:13Z",
        "component": "Performance: Responsiveness",
        "id": 1950838,
        "last_change_time": "2026-02-05T15:46:22Z",
        "severity": "S3",
        "priority": "--",
        "keywords": [
          "perf:responsiveness",
          "reproducible",
          "webcompat:needs-diagnosis",
          "webcompat:site-report"
        ],
        "status": "NEW",
        "summary": "fly.pieter.com blocks Firefox for being too slow",
        "op_sys": "Unspecified"
      },
      {
        "op_sys": "Unspecified",
        "summary": "High CPU on web.whatsapp.com",
        "priority": "P3",
        "keywords": [],
        "status": "NEW",
        "severity": "S3",
        "creation_time": "2025-03-01T19:37:51Z",
        "component": "Performance: Responsiveness",
        "id": 1951251,
        "last_change_time": "2025-09-08T15:57:19Z"
      },
      {
        "status": "NEW",
        "priority": "--",
        "keywords": [
          "perf"
        ],
        "op_sys": "Unspecified",
        "summary": "High CPU load on GitHub pull request pages when checks actively running and showing the progress spinners",
        "last_change_time": "2025-03-31T05:21:56Z",
        "id": 1953717,
        "creation_time": "2025-03-13T09:56:39Z",
        "component": "Performance: General",
        "severity": "S3"
      },
      {
        "creation_time": "2025-03-18T12:30:09Z",
        "component": "Places",
        "last_change_time": "2025-05-12T16:53:38Z",
        "id": 1954721,
        "severity": "S3",
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "status": "NEW",
        "summary": "Prevent animated SVGs being stored in Places",
        "op_sys": "Unspecified"
      },
      {
        "op_sys": "Unspecified",
        "summary": "tabs onUpdated is called unnecessarily during form.submit() (was: UBlock samples appear on an testcase submitting N forms even when uBlock is disabled on that page)",
        "status": "NEW",
        "priority": "P3",
        "keywords": [],
        "severity": "S3",
        "id": 1957813,
        "last_change_time": "2025-05-19T12:29:50Z",
        "creation_time": "2025-04-02T04:48:38Z",
        "component": "General"
      },
      {
        "component": "Performance: General",
        "creation_time": "2025-04-04T09:35:03Z",
        "last_change_time": "2026-01-07T19:47:36Z",
        "id": 1958480,
        "severity": "S3",
        "priority": "P3",
        "keywords": [],
        "status": "NEW",
        "summary": "x.com - High battery drain",
        "op_sys": "Unspecified"
      },
      {
        "severity": "S3",
        "component": "Graphics: WebRender",
        "creation_time": "2025-04-15T15:35:12Z",
        "last_change_time": "2025-06-16T20:00:53Z",
        "id": 1960675,
        "summary": "www.cursor.com - High CPU and GPU usage while scrolling the page",
        "op_sys": "Windows 10",
        "status": "NEW",
        "priority": "--",
        "keywords": []
      },
      {
        "summary": "ulucode.com - The page is laggy compared to Chrome",
        "op_sys": "macOS",
        "priority": "--",
        "keywords": [],
        "status": "NEW",
        "severity": "S3",
        "creation_time": "2025-04-25T08:26:38Z",
        "component": "Graphics: WebGPU",
        "last_change_time": "2025-05-17T12:54:52Z",
        "id": 1962628
      },
      {
        "last_change_time": "2025-06-02T20:11:44Z",
        "id": 1962655,
        "creation_time": "2025-04-25T10:48:37Z",
        "component": "Graphics: WebRender",
        "severity": "S3",
        "status": "NEW",
        "priority": "--",
        "keywords": [],
        "op_sys": "macOS",
        "summary": "codepen.io - Mask-composite values other than mask are showing performance issues"
      },
      {
        "op_sys": "Windows 10",
        "summary": "flourish.studio - The page shows performance issues",
        "status": "NEW",
        "keywords": [],
        "priority": "--",
        "severity": "S3",
        "id": 1964354,
        "last_change_time": "2025-05-26T16:39:51Z",
        "component": "Graphics: WebRender",
        "creation_time": "2025-05-05T09:52:02Z"
      },
      {
        "op_sys": "Unspecified",
        "summary": "openfront.io - The page is laggy when accessing/starting a game",
        "status": "NEW",
        "priority": "P3",
        "keywords": [],
        "severity": "S3",
        "creation_time": "2025-05-13T12:32:53Z",
        "component": "JavaScript Engine: JIT",
        "id": 1966081,
        "last_change_time": "2025-08-25T18:20:36Z"
      },
      {
        "priority": "--",
        "keywords": [],
        "status": "NEW",
        "summary": "[Linux] File downloading is CPU-intensive",
        "op_sys": "Linux",
        "last_change_time": "2026-03-04T16:38:49Z",
        "id": 1972941,
        "component": "Downloads API",
        "creation_time": "2025-06-18T23:31:33Z",
        "severity": "--"
      },
      {
        "id": 1974256,
        "last_change_time": "2025-09-11T19:26:04Z",
        "creation_time": "2025-06-26T15:28:34Z",
        "component": "Performance: General",
        "severity": "S3",
        "keywords": [],
        "priority": "--",
        "status": "NEW",
        "op_sys": "Windows",
        "summary": "www.shockwave.com - Slow game load"
      },
      {
        "creation_time": "2025-07-04T10:07:28Z",
        "component": "Audio/Video: Playback",
        "last_change_time": "2026-03-14T01:11:50Z",
        "id": 1975697,
        "severity": "S3",
        "keywords": [],
        "priority": "P3",
        "status": "NEW",
        "op_sys": "All",
        "summary": "High CPU usage when opening openai.com on a new profile"
      },
      {
        "status": "NEW",
        "priority": "--",
        "keywords": [],
        "summary": "lendkraft.ai - The amount of resources used increases when accessing the page",
        "op_sys": "Linux",
        "id": 1977339,
        "last_change_time": "2025-10-01T18:55:50Z",
        "creation_time": "2025-07-15T09:28:58Z",
        "component": "Graphics: WebRender",
        "severity": "S3"
      },
      {
        "keywords": [],
        "priority": "--",
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "History.pushState is needlessly slow when changing only url parameters",
        "component": "DOM: Core & HTML",
        "creation_time": "2025-08-20T16:44:51Z",
        "id": 1984134,
        "last_change_time": "2025-09-07T16:29:15Z",
        "severity": "S3"
      },
      {
        "severity": "S4",
        "component": "CSS Parsing and Computation",
        "creation_time": "2025-09-02T13:53:24Z",
        "id": 1986454,
        "last_change_time": "2025-10-03T08:04:51Z",
        "op_sys": "Unspecified",
        "summary": "Zooming in and out on a long https://hg-edge.mozilla.org/ page causes considerable lag",
        "status": "NEW",
        "priority": "--",
        "keywords": []
      },
      {
        "summary": "Too often too high CPU and Memory (RAM) consumption with Firefox latest (currently 142.0.1",
        "op_sys": "Unspecified",
        "status": "NEW",
        "keywords": [
          "topcrash"
        ],
        "priority": "P3",
        "severity": "S3",
        "creation_time": "2025-09-04T13:14:52Z",
        "component": "Bookmarks & History",
        "id": 1986910,
        "last_change_time": "2025-12-14T18:09:29Z"
      },
      {
        "creation_time": "2025-09-08T10:58:12Z",
        "component": "Performance: General",
        "last_change_time": "2025-09-30T07:08:34Z",
        "id": 1987376,
        "severity": "S3",
        "status": "NEW",
        "keywords": [
          "webcompat:needs-diagnosis",
          "webcompat:site-report"
        ],
        "priority": "--",
        "op_sys": "Windows 10",
        "summary": "all-spares.ua - High CPU and RAM consumption, the page is not responsive"
      },
      {
        "keywords": [
          "regression",
          "regressionwindow-wanted"
        ],
        "priority": "--",
        "status": "NEW",
        "op_sys": "All",
        "summary": "www.notebooksbilliger.de - The page does not instantly load",
        "component": "Performance: General",
        "creation_time": "2025-09-29T08:39:36Z",
        "last_change_time": "2025-10-20T19:28:26Z",
        "id": 1991381,
        "severity": "S3"
      },
      {
        "creation_time": "2025-10-01T12:23:51Z",
        "component": "Graphics: WebRender",
        "id": 1991890,
        "last_change_time": "2025-12-01T14:13:58Z",
        "severity": "S3",
        "keywords": [],
        "priority": "--",
        "status": "NEW",
        "summary": "getdione.app - Scrolling is laggy",
        "op_sys": "Android"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Slow PDF due to CMYK images",
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "status": "NEW",
        "severity": "S3",
        "id": 1994225,
        "last_change_time": "2026-02-09T10:04:03Z",
        "component": "PDF Viewer",
        "creation_time": "2025-10-14T15:40:06Z"
      },
      {
        "status": "NEW",
        "keywords": [
          "webcompat:site-report"
        ],
        "priority": "--",
        "op_sys": "Android",
        "summary": "getblockify.com - 90hz devices are showing performance issues when using Firefox",
        "component": "Performance: General",
        "creation_time": "2025-10-20T12:09:11Z",
        "last_change_time": "2026-02-05T15:53:13Z",
        "id": 1995266,
        "severity": "S4"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Failed file operation during startup that potentially could be eliminated",
        "status": "NEW",
        "keywords": [],
        "priority": "--",
        "severity": "--",
        "component": "XPCOM",
        "creation_time": "2026-01-27T13:07:12Z",
        "id": 2012705,
        "last_change_time": "2026-02-19T17:49:31Z"
      },
      {
        "severity": "--",
        "last_change_time": "2026-03-12T21:49:37Z",
        "id": 2015721,
        "component": "Graphics: WebRender",
        "creation_time": "2026-02-10T09:59:50Z",
        "op_sys": "Windows 10",
        "summary": "www.gradcracker.com - Scrolling isn't smooth",
        "keywords": [],
        "priority": "--",
        "status": "NEW"
      },
      {
        "severity": "S3",
        "component": "JavaScript Engine",
        "creation_time": "2015-12-31T22:36:47Z",
        "id": 1236104,
        "last_change_time": "2024-11-10T14:48:32Z",
        "summary": "Allow scripts from pre-load cache to be off-thread compiled.",
        "op_sys": "Unspecified",
        "keywords": [
          "perf"
        ],
        "priority": "--",
        "status": "REOPENED"
      },
      {
        "summary": "Yield to painting during GC",
        "op_sys": "Unspecified",
        "keywords": [
          "perf:responsiveness",
          "triage-deferred"
        ],
        "priority": "P3",
        "status": "REOPENED",
        "severity": "S3",
        "last_change_time": "2023-08-05T00:12:47Z",
        "id": 1308039,
        "component": "JavaScript: GC",
        "creation_time": "2016-10-05T23:40:26Z"
      },
      {
        "summary": "Emit profiler markers for discarding Ion code",
        "op_sys": "All",
        "status": "REOPENED",
        "priority": "P3",
        "keywords": [
          "perf",
          "stale-bug"
        ],
        "severity": "S3",
        "component": "JavaScript Engine: JIT",
        "creation_time": "2017-01-10T08:53:07Z",
        "id": 1329923,
        "last_change_time": "2025-01-29T16:47:01Z"
      },
      {
        "op_sys": "Unspecified",
        "summary": "WriteStructuredClone can be slow on Google Drive",
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "status": "REOPENED",
        "severity": "S3",
        "id": 1341900,
        "last_change_time": "2022-10-11T19:02:27Z",
        "component": "JavaScript Engine",
        "creation_time": "2017-02-22T22:49:06Z"
      },
      {
        "severity": "S3",
        "creation_time": "2017-04-22T23:30:21Z",
        "component": "Add-ons Manager",
        "id": 1358829,
        "last_change_time": "2022-10-11T19:13:44Z",
        "summary": "0.99ms uninterruptible reflow at loadViewInternal@chrome://mozapps/content/extensions/extensions.js:932:5",
        "op_sys": "Unspecified",
        "status": "REOPENED",
        "priority": "P3",
        "keywords": []
      },
      {
        "summary": "Initializing gfxPlatform to get telemetry data is quite slow",
        "op_sys": "Unspecified",
        "priority": "P3",
        "keywords": [
          "perf",
          "perf:startup"
        ],
        "status": "REOPENED",
        "severity": "S3",
        "creation_time": "2017-04-23T21:46:03Z",
        "component": "Graphics",
        "id": 1358927,
        "last_change_time": "2024-04-16T17:03:09Z"
      },
      {
        "severity": "S3",
        "creation_time": "2017-06-09T14:01:35Z",
        "component": "JavaScript Engine",
        "last_change_time": "2022-10-11T19:22:21Z",
        "id": 1371659,
        "op_sys": "Windows 10",
        "summary": "Google Search profile",
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "status": "REOPENED"
      },
      {
        "status": "REOPENED",
        "keywords": [
          "perf"
        ],
        "priority": "P3",
        "summary": "Performance analysis on gmail_ail_reply_mail",
        "op_sys": "Windows 10",
        "creation_time": "2017-07-17T05:59:34Z",
        "component": "JavaScript Engine",
        "last_change_time": "2022-10-11T19:29:34Z",
        "id": 1381387,
        "severity": "S3"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Specific PDF  page takes 10s to render (200% cpu)",
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "status": "REOPENED",
        "severity": "S3",
        "component": "PDF Viewer",
        "creation_time": "2017-11-21T18:29:09Z",
        "id": 1419502,
        "last_change_time": "2025-04-16T07:40:27Z"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Slow animation when using Mapbox GL",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3",
        "status": "REOPENED",
        "severity": "S4",
        "creation_time": "2021-09-22T12:23:30Z",
        "component": "JavaScript Engine",
        "id": 1732049,
        "last_change_time": "2024-02-19T10:26:10Z"
      },
      {
        "keywords": [],
        "priority": "P3",
        "status": "REOPENED",
        "op_sys": "Linux",
        "summary": "Memory spike when closing 200-300 tabs at once",
        "component": "Performance: General",
        "creation_time": "2021-11-29T08:14:36Z",
        "last_change_time": "2025-11-19T03:54:09Z",
        "id": 1743351,
        "severity": "S3"
      },
      {
        "component": "General",
        "creation_time": "2022-03-25T20:11:57Z",
        "id": 1761554,
        "last_change_time": "2022-05-20T19:15:44Z",
        "severity": "S3",
        "status": "REOPENED",
        "keywords": [
          "perf:resource-use",
          "perf:responsiveness"
        ],
        "priority": "P2",
        "summary": "`ResourceCommand`'s `_cache` can grow indefinitely",
        "op_sys": "Unspecified"
      },
      {
        "status": "REOPENED",
        "priority": "P3",
        "keywords": [
          "perf:startup"
        ],
        "summary": "Reduce first-startup.timeout from 30 seconds to something reasonable",
        "op_sys": "All",
        "id": 1789850,
        "last_change_time": "2024-03-14T23:29:50Z",
        "component": "Installer",
        "creation_time": "2022-09-08T14:43:03Z",
        "severity": "S3"
      },
      {
        "last_change_time": "2025-01-04T07:34:21Z",
        "id": 1823729,
        "component": "General",
        "creation_time": "2023-03-21T16:04:41Z",
        "severity": "S3",
        "keywords": [
          "perf:resource-use",
          "perf:responsiveness",
          "top50"
        ],
        "priority": "P2",
        "status": "REOPENED",
        "op_sys": "Unspecified",
        "summary": "parent process can consume many GB of memory if google document active"
      },
      {
        "priority": "P2",
        "keywords": [],
        "status": "REOPENED",
        "op_sys": "Unspecified",
        "summary": "Opening https://colorjs.io/ keeps the parent-process very busy for 4+seconds, spending  tons of time in network-y IPC. This results in stutter while scrolling",
        "id": 1904284,
        "last_change_time": "2025-11-19T14:08:23Z",
        "component": "Networking",
        "creation_time": "2024-06-24T06:45:35Z",
        "severity": "S3"
      },
      {
        "component": "Graphics: Canvas2D",
        "creation_time": "2024-10-25T08:16:00Z",
        "id": 1927053,
        "last_change_time": "2026-03-16T12:04:31Z",
        "severity": "S3",
        "keywords": [
          "leave-open",
          "webcompat:needs-diagnosis",
          "webcompat:site-report"
        ],
        "priority": "P3",
        "status": "REOPENED",
        "summary": "e.issuu.com - Magazine pages are not fully loaded and navigation is laggy",
        "op_sys": "Windows 10"
      },
      {
        "status": "UNCONFIRMED",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "--",
        "summary": "high number of events /s reported by powertop when idle",
        "op_sys": "Linux",
        "creation_time": "2013-02-27T06:06:20Z",
        "component": "Performance: General",
        "id": 845677,
        "last_change_time": "2024-07-18T15:42:44Z",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "last_change_time": "2022-10-11T18:04:53Z",
        "id": 1253394,
        "component": "Layout",
        "creation_time": "2016-03-03T20:31:22Z",
        "op_sys": "Unspecified",
        "summary": "jquery performance increases if the page is displayed in a iframe",
        "status": "UNCONFIRMED",
        "priority": "--",
        "keywords": [
          "perf"
        ]
      },
      {
        "creation_time": "2016-04-20T17:12:27Z",
        "component": "JavaScript Engine",
        "id": 1266140,
        "last_change_time": "2023-04-11T19:49:42Z",
        "severity": "S3",
        "status": "UNCONFIRMED",
        "keywords": [],
        "priority": "P3",
        "summary": "Object.keys 50% slower than for...in",
        "op_sys": "Unspecified"
      },
      {
        "severity": "S3",
        "id": 1329486,
        "last_change_time": "2025-09-25T19:16:36Z",
        "creation_time": "2017-01-08T13:10:12Z",
        "component": "Networking",
        "op_sys": "Windows 10",
        "summary": "Poor HTTPs performance. Firefox 50.1.0 windows vs Chrome. Speedtest",
        "status": "UNCONFIRMED",
        "priority": "P3",
        "keywords": [
          "perf"
        ]
      },
      {
        "severity": "S3",
        "component": "Layout",
        "creation_time": "2017-11-02T05:56:45Z",
        "id": 1413810,
        "last_change_time": "2022-10-11T19:54:16Z",
        "op_sys": "Unspecified",
        "summary": "Performance is poor on Ebay.ca Watch List",
        "status": "UNCONFIRMED",
        "keywords": [
          "perf"
        ],
        "priority": "P3"
      },
      {
        "priority": "--",
        "keywords": [
          "perf:resource-use",
          "power"
        ],
        "status": "UNCONFIRMED",
        "op_sys": "macOS",
        "summary": "Firefox uses a lot of CPU on MacOS",
        "creation_time": "2017-11-26T11:01:38Z",
        "component": "General",
        "last_change_time": "2022-11-02T13:09:25Z",
        "id": 1420699,
        "severity": "S3"
      },
      {
        "severity": "S3",
        "component": "Graphics",
        "creation_time": "2017-12-15T01:56:41Z",
        "id": 1425389,
        "last_change_time": "2022-10-11T21:06:19Z",
        "op_sys": "Windows 10",
        "summary": "Low javascript performance on Firefox Quantum",
        "priority": "P3",
        "keywords": [
          "perf"
        ],
        "status": "UNCONFIRMED"
      },
      {
        "severity": "S3",
        "last_change_time": "2022-10-11T22:09:30Z",
        "id": 1503425,
        "creation_time": "2018-10-30T23:19:36Z",
        "component": "Graphics",
        "summary": "User reports lag such as when opening several new tabs",
        "op_sys": "Windows 10",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness",
          "regression"
        ],
        "status": "UNCONFIRMED"
      },
      {
        "op_sys": "Unspecified",
        "summary": "9gag gets progressively slower to render as user scrolls down page (infinite scroll)",
        "status": "UNCONFIRMED",
        "keywords": [
          "perf",
          "perf:responsiveness"
        ],
        "priority": "P3",
        "severity": "S3",
        "component": "Performance: Responsiveness",
        "creation_time": "2019-01-24T19:01:08Z",
        "last_change_time": "2025-03-21T01:05:05Z",
        "id": 1522612
      },
      {
        "creation_time": "2019-03-29T04:39:42Z",
        "component": "Graphics",
        "last_change_time": "2022-10-11T22:40:11Z",
        "id": 1540026,
        "severity": "S3",
        "status": "UNCONFIRMED",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "summary": "RTX On/Off comparison on nvidia.com runs at a drastically lower FPS in Firefox than in Chrome",
        "op_sys": "Unspecified"
      },
      {
        "op_sys": "Unspecified",
        "summary": "my cpu is 10-15 degrees hotter on firefox (55...60C) than on google chrome (45..50C)",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3",
        "status": "UNCONFIRMED",
        "severity": "S3",
        "id": 1544091,
        "last_change_time": "2024-09-16T21:16:40Z",
        "creation_time": "2019-04-12T19:19:44Z",
        "component": "Performance: General"
      },
      {
        "creation_time": "2019-06-04T18:10:31Z",
        "component": "Performance: Responsiveness",
        "last_change_time": "2025-03-21T01:03:07Z",
        "id": 1556815,
        "severity": "S3",
        "status": "UNCONFIRMED",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P3",
        "op_sys": "Unspecified",
        "summary": "High CPU usage when browsing LinkedIn on Linux"
      },
      {
        "summary": "Firefox freezes for 10 to 15 seconds every so often while working with Android Studio",
        "op_sys": "Unspecified",
        "status": "UNCONFIRMED",
        "keywords": [],
        "priority": "P5",
        "severity": "S3",
        "component": "Performance: General",
        "creation_time": "2019-06-10T12:35:43Z",
        "last_change_time": "2023-10-05T13:53:23Z",
        "id": 1558170
      },
      {
        "component": "DOM: Device Interfaces",
        "creation_time": "2019-12-15T22:12:58Z",
        "last_change_time": "2022-10-11T23:45:06Z",
        "id": 1604077,
        "severity": "S3",
        "status": "UNCONFIRMED",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "--",
        "op_sys": "Unspecified",
        "summary": "Firefox Hangs Repeatedly Loading Some Sites"
      },
      {
        "status": "UNCONFIRMED",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "op_sys": "Linux",
        "summary": "Middle button actions slow when primary selection belongs to a remote process",
        "component": "Widget: Gtk",
        "creation_time": "2020-04-08T07:02:56Z",
        "last_change_time": "2023-05-16T18:03:55Z",
        "id": 1628220,
        "severity": "S3"
      },
      {
        "severity": "S3",
        "creation_time": "2020-05-13T13:55:53Z",
        "component": "Performance: General",
        "id": 1637606,
        "last_change_time": "2025-05-23T13:44:29Z",
        "summary": "HTML Based Speed Tests Produce Slower Results or Fail",
        "op_sys": "Unspecified",
        "status": "UNCONFIRMED",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3"
      },
      {
        "summary": "High Memory Usage, differs from Task Manager, GC, CC, Minimize Memory",
        "op_sys": "Unspecified",
        "status": "UNCONFIRMED",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3",
        "severity": "S3",
        "component": "Performance: General",
        "creation_time": "2020-07-23T07:37:07Z",
        "id": 1654738,
        "last_change_time": "2023-01-31T01:56:31Z"
      },
      {
        "severity": "S3",
        "creation_time": "2020-08-20T08:08:34Z",
        "component": "Performance: Responsiveness",
        "id": 1660184,
        "last_change_time": "2025-04-24T20:26:08Z",
        "op_sys": "Unspecified",
        "summary": "FireFox 78 x64 and newer on Windows after a while becomes slow",
        "status": "UNCONFIRMED",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ]
      },
      {
        "severity": "S4",
        "id": 1663360,
        "last_change_time": "2022-03-02T16:40:20Z",
        "component": "JavaScript Engine",
        "creation_time": "2020-09-06T21:27:19Z",
        "op_sys": "Unspecified",
        "summary": "Choppy Animation of Pie and Line chart during page load",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "UNCONFIRMED"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Firefox leaked RAM consumption on MacOS",
        "status": "UNCONFIRMED",
        "keywords": [],
        "priority": "P5",
        "severity": "S3",
        "last_change_time": "2022-08-31T11:49:30Z",
        "id": 1678257,
        "creation_time": "2020-11-19T10:26:47Z",
        "component": "Graphics: Text"
      },
      {
        "summary": "Two (and more) Firefox instances running at the same time have a bad impact for other applications on systems with 8GB of RAM",
        "op_sys": "Unspecified",
        "status": "UNCONFIRMED",
        "priority": "P3",
        "keywords": [],
        "severity": "S3",
        "last_change_time": "2022-08-31T11:50:56Z",
        "id": 1679772,
        "creation_time": "2020-11-30T13:17:08Z",
        "component": "Performance: General"
      },
      {
        "id": 1686094,
        "last_change_time": "2025-03-21T01:03:23Z",
        "component": "Performance: Responsiveness",
        "creation_time": "2021-01-11T18:45:20Z",
        "severity": "--",
        "status": "UNCONFIRMED",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P3",
        "summary": "freezing on Facebook website with other tabs in the background",
        "op_sys": "Unspecified"
      },
      {
        "severity": "S3",
        "id": 1695439,
        "last_change_time": "2025-05-23T13:32:21Z",
        "component": "Performance: Memory",
        "creation_time": "2021-02-27T16:46:04Z",
        "summary": "FireFox using too much RAM",
        "op_sys": "Unspecified",
        "priority": "P3",
        "keywords": [
          "perf:resource-use"
        ],
        "status": "UNCONFIRMED"
      },
      {
        "severity": "S3",
        "creation_time": "2021-05-13T13:39:18Z",
        "component": "Performance: Responsiveness",
        "last_change_time": "2025-03-21T01:05:00Z",
        "id": 1711037,
        "summary": "Twitter in a container freezes computer and drags Firefox to a halt",
        "op_sys": "Unspecified",
        "keywords": [
          "perf:responsiveness"
        ],
        "priority": "P3",
        "status": "UNCONFIRMED"
      },
      {
        "severity": "S3",
        "last_change_time": "2025-10-14T12:36:51Z",
        "id": 1721034,
        "component": "Performance: Memory",
        "creation_time": "2021-07-18T03:09:26Z",
        "summary": "Firefox Uses Over 12 GB of RAM When Accessing https://www.pch.com/sweepstakes/all-pch-sweeps",
        "op_sys": "Unspecified",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3",
        "status": "UNCONFIRMED"
      },
      {
        "op_sys": "Windows 10",
        "summary": "Firefox using 12%-30% cpu for no apparent reason (FF 91.0b3)",
        "status": "UNCONFIRMED",
        "priority": "P3",
        "keywords": [
          "perf:resource-use"
        ],
        "severity": "S3",
        "last_change_time": "2025-05-23T13:44:33Z",
        "id": 1721070,
        "creation_time": "2021-07-18T14:36:09Z",
        "component": "Performance: General"
      },
      {
        "status": "UNCONFIRMED",
        "keywords": [
          "perf",
          "perf:resource-use"
        ],
        "priority": "P3",
        "op_sys": "Unspecified",
        "summary": "https://rationalwiki.org/wiki/Logical_fallacy using lots of CPU",
        "creation_time": "2022-02-06T22:03:48Z",
        "component": "Performance: General",
        "id": 1753901,
        "last_change_time": "2022-08-31T12:52:27Z",
        "severity": "S3"
      },
      {
        "component": "Graphics: WebRender",
        "creation_time": "2022-04-21T23:50:49Z",
        "id": 1765897,
        "last_change_time": "2024-03-22T20:20:21Z",
        "severity": "S4",
        "status": "UNCONFIRMED",
        "priority": "--",
        "keywords": [
          "perf:animation",
          "perf:responsiveness"
        ],
        "summary": "Performance on https://dragonflight.blizzard.com is not very good",
        "op_sys": "Linux"
      },
      {
        "severity": "--",
        "last_change_time": "2024-04-03T23:11:13Z",
        "id": 1765945,
        "creation_time": "2022-04-22T07:19:42Z",
        "component": "Widget: Gtk",
        "op_sys": "Unspecified",
        "summary": "Firefox freezes saving files to folder containing lots of images with GTK_USE_PORTAL=1 set (Linux, KDE Plasma 5)",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "UNCONFIRMED"
      },
      {
        "summary": "Extreme performance drop when multiple windows are open on Ubuntu 21.10",
        "op_sys": "Linux",
        "priority": "--",
        "keywords": [
          "perf:animation",
          "perf:responsiveness"
        ],
        "status": "UNCONFIRMED",
        "severity": "--",
        "component": "Widget: Gtk",
        "creation_time": "2022-04-22T20:43:40Z",
        "last_change_time": "2025-03-11T13:01:11Z",
        "id": 1766063
      },
      {
        "severity": "S3",
        "id": 1768112,
        "last_change_time": "2025-03-11T07:17:42Z",
        "component": "Graphics: WebRender",
        "creation_time": "2022-05-06T02:06:48Z",
        "op_sys": "Linux",
        "summary": "firefox takes 80% CPU time due to invisible \"100 Thank-Yous\"",
        "status": "UNCONFIRMED",
        "priority": "P3",
        "keywords": [
          "perf:resource-use"
        ]
      },
      {
        "creation_time": "2022-07-22T07:59:41Z",
        "component": "Audio/Video",
        "id": 1780732,
        "last_change_time": "2025-03-20T15:52:47Z",
        "severity": "S3",
        "priority": "--",
        "keywords": [
          "perf:resource-use"
        ],
        "status": "UNCONFIRMED",
        "summary": "Memory leak",
        "op_sys": "Unspecified"
      },
      {
        "severity": "--",
        "creation_time": "2022-09-01T00:29:13Z",
        "component": "Performance: General",
        "id": 1788552,
        "last_change_time": "2024-06-28T12:12:39Z",
        "op_sys": "Unspecified",
        "summary": "memory",
        "status": "UNCONFIRMED",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "--"
      },
      {
        "component": "Graphics: WebRender",
        "creation_time": "2022-09-11T15:24:54Z",
        "id": 1790262,
        "last_change_time": "2024-04-03T01:49:26Z",
        "severity": "S4",
        "priority": "--",
        "keywords": [
          "perf:resource-use"
        ],
        "status": "UNCONFIRMED",
        "summary": "high energy usage on mac m1",
        "op_sys": "macOS"
      },
      {
        "op_sys": "Unspecified",
        "summary": "using a lot of ram",
        "status": "UNCONFIRMED",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "--",
        "severity": "--",
        "component": "Performance: General",
        "creation_time": "2022-10-06T18:18:54Z",
        "last_change_time": "2024-06-28T12:12:31Z",
        "id": 1794014
      },
      {
        "summary": "specific page leads to 100% cpu with webrender software",
        "op_sys": "Unspecified",
        "priority": "--",
        "keywords": [
          "perf:pageload",
          "perf:responsiveness"
        ],
        "status": "UNCONFIRMED",
        "severity": "S3",
        "last_change_time": "2023-08-05T00:20:33Z",
        "id": 1809608,
        "creation_time": "2023-01-11T09:42:20Z",
        "component": "Graphics: WebRender"
      },
      {
        "creation_time": "2023-01-11T16:53:34Z",
        "component": "JavaScript Engine",
        "id": 1809674,
        "last_change_time": "2023-12-08T01:59:42Z",
        "severity": "S4",
        "priority": "P3",
        "keywords": [],
        "status": "UNCONFIRMED",
        "summary": "myemulator.online too slow (WASM, RTQueryCounter, and fingerprint-resist)",
        "op_sys": "Unspecified"
      },
      {
        "status": "UNCONFIRMED",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "summary": "Firefox hangs on Linux when connecting to dbus",
        "op_sys": "Linux",
        "id": 1810733,
        "last_change_time": "2023-07-12T07:24:17Z",
        "creation_time": "2023-01-17T13:37:41Z",
        "component": "Shell Integration",
        "severity": "S3"
      },
      {
        "priority": "P2",
        "keywords": [],
        "status": "UNCONFIRMED",
        "summary": "This reddit page with multiple playing videos causes slow compositing (worse than in Chrome)",
        "op_sys": "Windows 10",
        "last_change_time": "2026-02-20T10:03:03Z",
        "id": 1812018,
        "component": "Graphics: WebRender",
        "creation_time": "2023-01-24T11:34:09Z",
        "severity": "S3"
      },
      {
        "summary": "Sometimes memory usage explodes",
        "op_sys": "Windows 10",
        "keywords": [],
        "priority": "--",
        "status": "UNCONFIRMED",
        "severity": "S3",
        "creation_time": "2023-03-04T00:27:34Z",
        "component": "Performance: Memory",
        "id": 1820299,
        "last_change_time": "2025-11-14T01:28:20Z"
      },
      {
        "summary": "Excessive memory usage... since 112.0 Beta and 113.a1 Nightly",
        "op_sys": "Unspecified",
        "status": "UNCONFIRMED",
        "priority": "--",
        "keywords": [
          "perf:resource-use"
        ],
        "severity": "S3",
        "component": "Performance: Memory",
        "creation_time": "2023-04-08T18:23:53Z",
        "id": 1827094,
        "last_change_time": "2025-05-23T13:32:17Z"
      },
      {
        "severity": "--",
        "creation_time": "2023-05-08T18:00:07Z",
        "component": "Performance: General",
        "id": 1831928,
        "last_change_time": "2024-07-23T03:17:00Z",
        "op_sys": "Unspecified",
        "summary": "Firefox is using a large amount of memory for tasks (750MB of gpu-committed)",
        "status": "UNCONFIRMED",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "--"
      },
      {
        "summary": "Nvidia+Intel dual GPU: PDF rendering freezes the system frequently for several seconds.",
        "op_sys": "Linux",
        "priority": "--",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "UNCONFIRMED",
        "severity": "S3",
        "component": "Graphics: CanvasWebGL",
        "creation_time": "2023-06-01T06:11:17Z",
        "last_change_time": "2023-08-10T14:22:01Z",
        "id": 1836199
      },
      {
        "summary": "High CPU use when browser is idle",
        "op_sys": "Unspecified",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3",
        "status": "UNCONFIRMED",
        "severity": "S3",
        "last_change_time": "2024-09-12T14:54:36Z",
        "id": 1839036,
        "creation_time": "2023-06-17T20:08:01Z",
        "component": "JavaScript: GC"
      },
      {
        "op_sys": "Unspecified",
        "summary": "YouTube takes 7 s to show cookie banner",
        "status": "UNCONFIRMED",
        "priority": "P3",
        "keywords": [
          "perf:pageload",
          "top50"
        ],
        "severity": "S3",
        "last_change_time": "2025-04-28T16:18:05Z",
        "id": 1840252,
        "component": "Performance: Navigation",
        "creation_time": "2023-06-24T21:08:25Z"
      },
      {
        "component": "Graphics: ImageLib",
        "creation_time": "2023-07-08T16:57:29Z",
        "last_change_time": "2023-10-20T20:36:06Z",
        "id": 1842382,
        "severity": "S3",
        "priority": "--",
        "keywords": [
          "perf:pageload",
          "reproducible"
        ],
        "status": "UNCONFIRMED",
        "summary": "Memory leak when SVG sprites are loaded (3300 SVGs)",
        "op_sys": "Unspecified"
      },
      {
        "keywords": [
          "perf:animation",
          "reproducible"
        ],
        "priority": "P3",
        "status": "UNCONFIRMED",
        "summary": "Obfuscated JS with huge amounts of function creation performs poorly.",
        "op_sys": "Unspecified",
        "component": "JavaScript Engine",
        "creation_time": "2023-07-29T05:28:41Z",
        "id": 1846115,
        "last_change_time": "2024-12-03T18:28:56Z",
        "severity": "S3"
      },
      {
        "op_sys": "Unspecified",
        "summary": "delete cookies on shutdown is very slow",
        "priority": "P3",
        "keywords": [],
        "status": "UNCONFIRMED",
        "severity": "S3",
        "id": 1848585,
        "last_change_time": "2025-02-20T14:10:18Z",
        "creation_time": "2023-08-14T07:08:31Z",
        "component": "Data Sanitization"
      },
      {
        "component": "Performance: General",
        "creation_time": "2023-09-03T19:45:09Z",
        "id": 1851386,
        "last_change_time": "2025-05-23T13:44:26Z",
        "severity": "S3",
        "status": "UNCONFIRMED",
        "priority": "--",
        "keywords": [],
        "summary": "Regression in 117 release",
        "op_sys": "Linux"
      },
      {
        "severity": "S3",
        "creation_time": "2023-09-13T10:48:40Z",
        "component": "Security: Process Sandboxing",
        "last_change_time": "2023-12-04T12:42:13Z",
        "id": 1852930,
        "op_sys": "Unspecified",
        "summary": "Runaway process \"plugin-container.app\" is usurping system resources",
        "priority": "P3",
        "keywords": [
          "perf:resource-use",
          "regression"
        ],
        "status": "UNCONFIRMED"
      },
      {
        "id": 1854628,
        "last_change_time": "2025-12-01T12:16:45Z",
        "component": "Graphics: CanvasWebGL",
        "creation_time": "2023-09-22T13:40:44Z",
        "severity": "--",
        "status": "UNCONFIRMED",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "--",
        "summary": "Huge memory leak, possibly in WebGL (Windows and Linux)",
        "op_sys": "Unspecified"
      },
      {
        "severity": "S3",
        "id": 1861856,
        "last_change_time": "2025-03-20T23:08:20Z",
        "creation_time": "2023-10-29T10:19:06Z",
        "component": "Performance: Startup",
        "summary": "[Linux] Native Wayland loads the DOM A LOT slower than XWayland?",
        "op_sys": "Unspecified",
        "status": "UNCONFIRMED",
        "priority": "P3",
        "keywords": [
          "perf:startup"
        ]
      },
      {
        "priority": "--",
        "keywords": [
          "memory-footprint",
          "perf:resource-use"
        ],
        "status": "UNCONFIRMED",
        "summary": "Memory leak in firefox",
        "op_sys": "Unspecified",
        "last_change_time": "2025-05-23T13:32:16Z",
        "id": 1861870,
        "creation_time": "2023-10-29T15:50:14Z",
        "component": "Performance: Memory",
        "severity": "S3"
      },
      {
        "keywords": [
          "perf:startup"
        ],
        "priority": "P3",
        "status": "UNCONFIRMED",
        "op_sys": "Unspecified",
        "summary": "while gtk3 dev is installed, and exists libgail.so, firefox cannot find it.",
        "component": "Widget: Gtk",
        "creation_time": "2023-12-06T16:58:13Z",
        "id": 1868609,
        "last_change_time": "2024-02-09T13:13:26Z",
        "severity": "--"
      },
      {
        "priority": "P3",
        "keywords": [
          "perf:resource-use"
        ],
        "status": "UNCONFIRMED",
        "op_sys": "Unspecified",
        "summary": "Potential Memory Leak When accessing PDF with User Agent Spoof",
        "id": 1870778,
        "last_change_time": "2024-02-09T14:45:57Z",
        "creation_time": "2023-12-19T05:55:02Z",
        "component": "PDF Viewer",
        "severity": "S3"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Firefox \"crash\" after a while PC locked",
        "keywords": [],
        "priority": "P3",
        "status": "UNCONFIRMED",
        "severity": "S3",
        "component": "Performance: General",
        "creation_time": "2024-01-24T13:28:27Z",
        "last_change_time": "2024-03-17T20:17:44Z",
        "id": 1876284
      },
      {
        "summary": "[GPU-canvas] Viewing webcam is slow (due to filters and gpu-canvas not falling back to skia-canvas)",
        "op_sys": "macOS",
        "status": "UNCONFIRMED",
        "keywords": [
          "perf:resource-use",
          "perf:responsiveness"
        ],
        "priority": "--",
        "severity": "S3",
        "id": 1882804,
        "last_change_time": "2024-03-12T15:29:31Z",
        "creation_time": "2024-02-29T15:28:41Z",
        "component": "Graphics: Canvas2D"
      },
      {
        "priority": "--",
        "keywords": [],
        "status": "UNCONFIRMED",
        "summary": "Firefox is using significantly more memory than usual.",
        "op_sys": "Windows",
        "creation_time": "2024-04-16T00:46:27Z",
        "component": "Performance: General",
        "id": 1891632,
        "last_change_time": "2024-12-02T12:33:24Z",
        "severity": "S4"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Very High Ram usage",
        "status": "UNCONFIRMED",
        "priority": "--",
        "keywords": [],
        "severity": "S3",
        "last_change_time": "2025-05-23T13:32:27Z",
        "id": 1891979,
        "creation_time": "2024-04-17T13:04:16Z",
        "component": "Performance: Memory"
      },
      {
        "id": 1894163,
        "last_change_time": "2024-06-07T16:45:16Z",
        "component": "Graphics",
        "creation_time": "2024-04-30T06:15:07Z",
        "severity": "--",
        "status": "UNCONFIRMED",
        "keywords": [],
        "priority": "--",
        "op_sys": "Unspecified",
        "summary": "Firefox takes up more than 1 GB of RAM even with only 7 tabs open"
      },
      {
        "op_sys": "Unspecified",
        "summary": "Stuttering when using multiple windows",
        "priority": "P3",
        "keywords": [
          "perf:responsiveness"
        ],
        "status": "UNCONFIRMED",
        "severity": "S4",
        "last_change_time": "2024-12-18T16:56:29Z",
        "id": 1918876,
        "creation_time": "2024-09-14T17:04:25Z",
        "component": "Graphics"
      },
      {
        "creation_time": "2024-09-28T06:28:31Z",
        "component": "Widget: Gtk",
        "id": 1921589,
        "last_change_time": "2025-02-13T20:16:09Z",
        "severity": "--",
        "status": "UNCONFIRMED",
        "priority": "--",
        "keywords": [],
        "summary": "BHR-detected hang",
        "op_sys": "Unspecified"
      },
      {
        "status": "UNCONFIRMED",
        "priority": "P3",
        "keywords": [],
        "op_sys": "Unspecified",
        "summary": "QuotaManager IO is consuming all CPU, causing websites to not load",
        "id": 1933799,
        "last_change_time": "2025-03-09T17:13:42Z",
        "creation_time": "2024-11-27T19:17:17Z",
        "component": "Storage: Quota Manager",
        "severity": "S3"
      },
      {
        "summary": "Constant CPU usage while idling on an ElevenLabs.io page with no animations",
        "op_sys": "Unspecified",
        "status": "UNCONFIRMED",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "--",
        "severity": "--",
        "id": 1941238,
        "last_change_time": "2025-05-08T13:24:57Z",
        "creation_time": "2025-01-12T22:22:15Z",
        "component": "Performance: General"
      },
      {
        "severity": "S3",
        "component": "Graphics: WebRender",
        "creation_time": "2025-01-24T01:48:26Z",
        "id": 1943503,
        "last_change_time": "2026-01-07T18:43:11Z",
        "op_sys": "Unspecified",
        "summary": "High CPU usage on Debian x64 bookworm (VMware player guest)",
        "status": "UNCONFIRMED",
        "keywords": [],
        "priority": "--"
      },
      {
        "status": "UNCONFIRMED",
        "priority": "--",
        "keywords": [],
        "summary": "Firefox 115.20.0 Firefox ESR  freezes",
        "op_sys": "Unspecified",
        "creation_time": "2025-02-06T14:14:45Z",
        "component": "Performance: General",
        "id": 1946434,
        "last_change_time": "2025-05-23T13:44:25Z",
        "severity": "S3"
      },
      {
        "severity": "S3",
        "component": "Performance: General",
        "creation_time": "2025-02-13T11:30:05Z",
        "last_change_time": "2025-05-23T13:44:26Z",
        "id": 1947991,
        "op_sys": "Unspecified",
        "summary": "PDF opening sometimes freezes",
        "priority": "--",
        "keywords": [],
        "status": "UNCONFIRMED"
      },
      {
        "severity": "N/A",
        "creation_time": "2025-03-04T17:22:13Z",
        "component": "JavaScript Engine",
        "last_change_time": "2025-03-31T12:07:27Z",
        "id": 1951721,
        "op_sys": "Unspecified",
        "summary": "Massively duplicated strings take up unnecessary memory",
        "keywords": [
          "perf:resource-use"
        ],
        "priority": "P3",
        "status": "UNCONFIRMED"
      },
      {
        "status": "UNCONFIRMED",
        "priority": "--",
        "keywords": [],
        "op_sys": "Linux",
        "summary": "Constant CPU usage while idle on the Tiki.org website front page",
        "last_change_time": "2026-01-07T19:43:11Z",
        "id": 1955509,
        "component": "Performance: General",
        "creation_time": "2025-03-21T04:36:35Z",
        "severity": "S4"
      },
      {
        "severity": "S4",
        "component": "Graphics: CanvasWebGL",
        "creation_time": "2025-03-26T14:32:49Z",
        "last_change_time": "2025-05-20T13:26:51Z",
        "id": 1956534,
        "op_sys": "Linux",
        "summary": "Bad Performance with FoundryVTT/OpenGL on Linux",
        "priority": "--",
        "keywords": [],
        "status": "UNCONFIRMED"
      },
      {
        "summary": "Excessive memory allocation when toolbar icons are updated (e.g., during downloads or extension changes) — sometimes triggers OOM killer",
        "op_sys": "Unspecified",
        "status": "UNCONFIRMED",
        "keywords": [],
        "priority": "--",
        "severity": "--",
        "last_change_time": "2026-01-09T11:44:07Z",
        "id": 1967585,
        "component": "Graphics",
        "creation_time": "2025-05-20T20:46:05Z"
      },
      {
        "creation_time": "2025-06-05T16:09:00Z",
        "component": "JavaScript Engine",
        "id": 1970681,
        "last_change_time": "2025-06-24T16:32:55Z",
        "severity": "S4",
        "status": "UNCONFIRMED",
        "keywords": [],
        "priority": "P3",
        "summary": "Stutter and lag on graphical heavy websites",
        "op_sys": "Unspecified"
      },
      {
        "keywords": [
          "perf"
        ],
        "priority": "--",
        "status": "UNCONFIRMED",
        "op_sys": "Unspecified",
        "summary": "Firefox is very slow to connect to .local machines",
        "id": 1985864,
        "last_change_time": "2026-03-12T15:00:36Z",
        "component": "Networking",
        "creation_time": "2025-08-28T18:29:24Z",
        "severity": "--"
      },
      {
        "last_change_time": "2026-03-14T22:36:48Z",
        "id": 1999598,
        "creation_time": "2025-11-12T03:03:36Z",
        "component": "Audio/Video",
        "severity": "S3",
        "status": "UNCONFIRMED",
        "keywords": [
          "power"
        ],
        "priority": "P3",
        "summary": "Firefox for macOS is using a lot of battery",
        "op_sys": "Unspecified"
      },
      {
        "op_sys": "Linux",
        "summary": "sometimes opening a new tab freezes firefox for a little bit",
        "status": "UNCONFIRMED",
        "keywords": [],
        "priority": "P5",
        "severity": "S4",
        "id": 2001924,
        "last_change_time": "2025-12-22T17:33:52Z",
        "creation_time": "2025-11-24T07:12:42Z",
        "component": "Graphics: WebGPU"
      },
      {
        "severity": "S3",
        "creation_time": "2025-12-28T00:30:32Z",
        "component": "Networking",
        "last_change_time": "2026-02-03T20:48:58Z",
        "id": 2007827,
        "summary": "Slow upload speed in Firefox 146.0.1 compared to Microsoft Edge",
        "op_sys": "Unspecified",
        "keywords": [],
        "priority": "P3",
        "status": "UNCONFIRMED"
      }
    ]
  },
  "untriaged": {
    "bugs": [
      {
        "summary": "Compositor CSS animations are not paused in fully occluded windows",
        "status": "NEW",
        "op_sys": "Unspecified",
        "last_change_time": "2025-10-21T21:08:38Z",
        "keywords": [
          "perf:resource-use",
          "power",
          "top50"
        ],
        "creation_time": "2022-05-31T12:05:20Z",
        "component": "Layout: Images, Video, and HTML Frames",
        "severity": "S3",
        "id": 1771902,
        "priority": "--"
      },
      {
        "priority": "--",
        "id": 1777875,
        "severity": "S2",
        "component": "Disability Access APIs",
        "creation_time": "2022-07-03T18:15:09Z",
        "keywords": [
          "perf"
        ],
        "last_change_time": "2025-10-08T10:20:41Z",
        "op_sys": "Windows 11",
        "status": "NEW",
        "summary": "Lenovo Privacy Guard with \"Enable this feature when typing passwords\" causing excessive UI responsiveness delays (jank)"
      },
      {
        "status": "NEW",
        "op_sys": "All",
        "summary": "[meta] High OOM rate and CC time in YouTube",
        "severity": "--",
        "component": "Performance: Memory",
        "id": 1931717,
        "priority": "--",
        "last_change_time": "2026-02-13T16:05:37Z",
        "keywords": [
          "crash",
          "meta",
          "perf:resource-use",
          "webcompat:platform-bug"
        ],
        "creation_time": "2024-11-16T19:12:14Z"
      },
      {
        "creation_time": "2024-12-28T17:57:03Z",
        "keywords": [],
        "last_change_time": "2025-04-14T12:19:20Z",
        "priority": "--",
        "id": 1939354,
        "severity": "--",
        "component": "Performance: Memory",
        "summary": "RAM too much",
        "op_sys": "Unspecified",
        "status": "UNCONFIRMED"
      },
      {
        "creation_time": "2025-01-15T07:26:07Z",
        "last_change_time": "2025-03-31T12:15:34Z",
        "keywords": [],
        "priority": "--",
        "severity": "S3",
        "component": "Performance: Memory",
        "id": 1941716,
        "summary": "On a fresh profile, Negative heap-unclassified on \"My Bugs\" query on b.m.o",
        "status": "NEW",
        "op_sys": "Unspecified"
      },
      {
        "priority": "--",
        "severity": "--",
        "component": "Performance: Memory",
        "id": 1943419,
        "creation_time": "2025-01-23T18:28:55Z",
        "last_change_time": "2025-04-14T12:19:24Z",
        "keywords": [],
        "status": "UNCONFIRMED",
        "op_sys": "Unspecified",
        "summary": "Fluidd memory leak"
      },
      {
        "summary": "Consume too much memory",
        "status": "UNCONFIRMED",
        "op_sys": "Unspecified",
        "creation_time": "2025-02-08T01:01:15Z",
        "last_change_time": "2025-03-31T14:05:44Z",
        "keywords": [],
        "priority": "--",
        "severity": "--",
        "component": "Performance: Memory",
        "id": 1946913
      },
      {
        "priority": "--",
        "id": 1959837,
        "severity": "S3",
        "component": "Performance: General",
        "creation_time": "2025-04-10T22:39:57Z",
        "keywords": [],
        "last_change_time": "2025-04-17T15:54:50Z",
        "op_sys": "Unspecified",
        "status": "NEW",
        "summary": "openstreetmap iD editor - slow zooming"
      },
      {
        "op_sys": "Unspecified",
        "status": "UNCONFIRMED",
        "summary": "high cpu memory youtube",
        "priority": "--",
        "id": 1964744,
        "severity": "S3",
        "component": "Performance: Memory",
        "creation_time": "2025-05-06T16:45:20Z",
        "keywords": [],
        "last_change_time": "2025-06-09T15:38:11Z"
      },
      {
        "op_sys": "Unspecified",
        "status": "NEW",
        "summary": "JS isn't minified in Fenix release builds",
        "id": 1966492,
        "component": "General",
        "severity": "S4",
        "priority": "P2",
        "keywords": [
          "perf",
          "perf:startup"
        ],
        "last_change_time": "2025-11-13T22:13:53Z",
        "creation_time": "2025-05-14T18:54:41Z"
      },
      {
        "last_change_time": "2025-12-01T12:17:20Z",
        "keywords": [],
        "creation_time": "2025-05-25T08:19:42Z",
        "severity": "S3",
        "component": "General",
        "id": 1968418,
        "priority": "P3",
        "summary": "Closing a long-running twitch tab hangs browser for minute(s) (GC in recvConduitClosed of Conduit)",
        "status": "NEW",
        "op_sys": "Unspecified"
      },
      {
        "status": "UNCONFIRMED",
        "op_sys": "Android",
        "summary": "Tabs in Firefox refresh when multitasking",
        "component": "Performance",
        "severity": "--",
        "id": 1988608,
        "priority": "--",
        "last_change_time": "2025-10-16T15:49:12Z",
        "keywords": [],
        "creation_time": "2025-09-15T20:07:07Z"
      },
      {
        "priority": "P3",
        "severity": "S3",
        "component": "DOM: Core & HTML",
        "id": 1988776,
        "creation_time": "2025-09-16T15:36:45Z",
        "last_change_time": "2025-09-17T15:30:35Z",
        "keywords": [],
        "status": "NEW",
        "op_sys": "Unspecified",
        "summary": "MutationObserver's getReceiverFor is slow when there are a lot of observers"
      },
      {
        "keywords": [
          "power"
        ],
        "last_change_time": "2025-12-10T15:52:42Z",
        "creation_time": "2025-10-11T05:46:40Z",
        "id": 1993778,
        "severity": "--",
        "component": "Performance: General",
        "priority": "--",
        "summary": "Firefox causes MacBook battery to drain fast",
        "op_sys": "Unspecified",
        "status": "UNCONFIRMED"
      },
      {
        "summary": "Search with bookmark keywords doesn't work when browser's lagging",
        "op_sys": "Unspecified",
        "status": "UNCONFIRMED",
        "keywords": [],
        "last_change_time": "2026-02-14T16:11:42Z",
        "creation_time": "2025-10-14T16:07:36Z",
        "id": 1994231,
        "severity": "S3",
        "component": "Performance",
        "priority": "--"
      },
      {
        "creation_time": "2025-10-16T19:01:04Z",
        "keywords": [],
        "last_change_time": "2026-03-06T18:06:27Z",
        "priority": "--",
        "id": 1994817,
        "component": "Graphics: WebRender",
        "severity": "S3",
        "summary": "Firefox CPU usage spikes to 100%+ on some sites, particularly when opening new tabs",
        "op_sys": "Unspecified",
        "status": "UNCONFIRMED"
      },
      {
        "priority": "--",
        "id": 2002795,
        "component": "UI Tests",
        "severity": "--",
        "creation_time": "2025-11-27T14:31:09Z",
        "keywords": [],
        "last_change_time": "2026-02-02T14:08:43Z",
        "op_sys": "Android",
        "status": "REOPENED",
        "summary": "Horrible new tab bar"
      },
      {
        "creation_time": "2026-01-05T15:33:01Z",
        "keywords": [],
        "last_change_time": "2026-01-29T14:34:23Z",
        "priority": "--",
        "id": 2008564,
        "component": "Performance: Responsiveness",
        "severity": "--",
        "summary": "UI freezes on long React/DOM sessions despite moderate CPU usage (main-thread JS long tasks)",
        "op_sys": "Unspecified",
        "status": "UNCONFIRMED"
      },
      {
        "creation_time": "2026-01-07T12:11:59Z",
        "last_change_time": "2026-02-18T12:08:18Z",
        "keywords": [
          "perf"
        ],
        "priority": "--",
        "severity": "--",
        "component": "Performance: Responsiveness",
        "id": 2008927,
        "summary": "Choppy/stuttering scrolling with touchpad",
        "status": "UNCONFIRMED",
        "op_sys": "Windows 11"
      },
      {
        "last_change_time": "2026-03-12T05:02:13Z",
        "keywords": [],
        "creation_time": "2026-03-09T14:11:27Z",
        "component": "Performance: General",
        "severity": "--",
        "id": 2021898,
        "priority": "--",
        "summary": "Resizing the vertical tabs sidebar is extremely slow and laggy",
        "status": "UNCONFIRMED",
        "op_sys": "Linux"
      }
    ]
  },
  "needinfo": {
    "bugs": [
      {
        "last_change_time": "2025-12-01T12:17:20Z",
        "status": "NEW",
        "summary": "Closing a long-running twitch tab hangs browser for minute(s) (GC in recvConduitClosed of Conduit)",
        "component": "General",
        "creation_time": "2025-05-25T08:19:42Z",
        "severity": "S3",
        "keywords": [],
        "op_sys": "Unspecified",
        "priority": "P3",
        "id": 1968418
      },
      {
        "id": 1940206,
        "priority": "--",
        "op_sys": "Unspecified",
        "keywords": [],
        "creation_time": "2025-01-07T05:08:26Z",
        "severity": "--",
        "component": "Performance: Memory",
        "status": "UNCONFIRMED",
        "summary": "Garbage collection is less efficient on macOS(ARM) than on Linux(x86)",
        "last_change_time": "2025-09-22T12:15:53Z"
      },
      {
        "component": "Graphics",
        "summary": "Dual monitor (laptop / Monitor) browsing very slow refresh in second monitor",
        "status": "UNCONFIRMED",
        "last_change_time": "2025-10-23T13:54:51Z",
        "creation_time": "2025-04-13T07:52:04Z",
        "severity": "--",
        "id": 1960195,
        "priority": "--",
        "op_sys": "Windows 11",
        "keywords": []
      },
      {
        "priority": "--",
        "id": 1961523,
        "keywords": [],
        "op_sys": "Unspecified",
        "severity": "--",
        "creation_time": "2025-04-20T11:59:18Z",
        "component": "Performance: General",
        "last_change_time": "2026-03-12T19:11:23Z",
        "status": "UNCONFIRMED",
        "summary": "Firefox constantly freezes"
      },
      {
        "id": 1964744,
        "priority": "--",
        "op_sys": "Unspecified",
        "keywords": [],
        "severity": "S3",
        "creation_time": "2025-05-06T16:45:20Z",
        "component": "Performance: Memory",
        "status": "UNCONFIRMED",
        "summary": "high cpu memory youtube",
        "last_change_time": "2025-06-09T15:38:11Z"
      },
      {
        "component": "Graphics",
        "summary": "Embedded video file playback hitching and freezing browser.",
        "status": "UNCONFIRMED",
        "last_change_time": "2025-10-23T13:55:27Z",
        "creation_time": "2025-07-16T12:32:39Z",
        "severity": "--",
        "id": 1977599,
        "priority": "--",
        "op_sys": "Unspecified",
        "keywords": []
      }
    ]
  },
  "regressions": {
    "bugs": [
      {
        "summary": "5.4 - 6.45% raptor-webaudio-firefox (linux64-shippable, linux64-shippable-qr) regression on push c170f9cb5e2c4d80e972f33d3134534ad3de313d (Tue November 17 2020)",
        "status": "NEW",
        "last_change_time": "2023-12-21T12:51:03Z",
        "component": "Toolchains",
        "severity": "S3",
        "creation_time": "2020-11-19T07:06:09Z",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "id": 1678235,
        "priority": "--"
      },
      {
        "component": "Session Restore",
        "last_change_time": "2023-12-21T12:24:39Z",
        "summary": "4.84 - 8.77% startup_about_home_paint_realworld_webextensions (windows10-64-shippable-qr) regression on push 6ca8cea4044a74c89e0137660c243bd542714abc (Mon November 16 2020)",
        "status": "ASSIGNED",
        "severity": "S3",
        "creation_time": "2020-11-20T07:38:38Z",
        "priority": "--",
        "id": 1678543,
        "keywords": [
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "op_sys": "Unspecified"
      },
      {
        "creation_time": "2021-02-12T09:37:45Z",
        "severity": "S3",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "priority": "--",
        "id": 1692426,
        "last_change_time": "2024-12-17T04:48:35Z",
        "status": "NEW",
        "summary": "11.15 - 11.5% amazon-search LastVisualChange (android-hw-g5-7-0-arm7-api-16-shippable) regression on push bd2b705457a3a72b97d343eb1ffa29a3bd9a7ecd (Tue February 9 2021)",
        "component": "Panning and Zooming"
      },
      {
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "id": 1701866,
        "priority": "--",
        "creation_time": "2021-03-30T06:46:34Z",
        "severity": "S3",
        "summary": "28.49 - 4.03% tsvg_static / tabswitch + 5 more (Linux, OSX, Windows) regression on Fri March 26 2021",
        "status": "NEW",
        "last_change_time": "2023-12-21T12:48:01Z",
        "component": "Layout"
      },
      {
        "severity": "S3",
        "creation_time": "2021-07-26T07:36:40Z",
        "op_sys": "All",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "id": 1722266,
        "priority": "--",
        "summary": "9.77 - 2.2% espn fcp / imdb PerceptualSpeedIndex + 113 more (Android) regression on Wed July 21 2021",
        "status": "NEW",
        "last_change_time": "2024-07-25T18:00:13Z",
        "component": "General"
      },
      {
        "component": "Graphics: ImageLib",
        "last_change_time": "2023-06-19T22:21:29Z",
        "status": "NEW",
        "summary": "8.2% ebay-kleinanzeigen LastVisualChange (Android) regression on Fri November 5 2021",
        "creation_time": "2021-11-09T09:00:28Z",
        "severity": "S3",
        "priority": "--",
        "id": 1740206,
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified"
      },
      {
        "last_change_time": "2025-06-09T14:37:01Z",
        "summary": "[fission] Page loads flickers and shows visible redraws (due to too-early paint unsuppression?)",
        "status": "REOPENED",
        "component": "Layout",
        "severity": "S3",
        "creation_time": "2021-11-10T13:41:32Z",
        "keywords": [
          "perf-alert",
          "regression"
        ],
        "op_sys": "All",
        "priority": "P2",
        "id": 1740499
      },
      {
        "last_change_time": "2024-02-27T19:11:26Z",
        "status": "NEW",
        "summary": "29.82 - 2.96% damp simple.inspector.reload.DAMP / damp complicated.jsdebugger.open.DAMP + 30 more (Linux, OSX, Windows) regression on Thu November 25 2021",
        "component": "General",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "priority": "--",
        "id": 1743359,
        "severity": "S3",
        "creation_time": "2021-11-29T08:54:56Z"
      },
      {
        "keywords": [
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "op_sys": "Unspecified",
        "priority": "--",
        "id": 1744777,
        "severity": "S3",
        "creation_time": "2021-12-07T15:43:56Z",
        "last_change_time": "2024-08-27T06:59:02Z",
        "status": "NEW",
        "summary": "70.01 - 48% glvideo Mean tick time across 100 ticks:  / glvideo Mean tick time across 100 ticks:  + 3 more (Linux) regression on Fri December 3 2021",
        "component": "Audio/Video: Playback"
      },
      {
        "keywords": [
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "priority": "--",
        "id": 1747897,
        "severity": "S3",
        "creation_time": "2021-12-29T15:25:58Z",
        "last_change_time": "2023-12-21T12:39:57Z",
        "summary": "12.91% build times (Android) regression on Sat December 18 2021",
        "status": "NEW",
        "component": "General"
      },
      {
        "status": "NEW",
        "summary": "26.88 - 22.51% reddit-billgates-post-1.posts ContentfulSpeedIndex / reddit-billgates-post-1.posts ContentfulSpeedIndex + 1 more (Linux) regression on Fri April 8 2022",
        "last_change_time": "2025-03-11T08:55:44Z",
        "component": "Widget: Gtk",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "id": 1764502,
        "priority": "--",
        "severity": "S3",
        "creation_time": "2022-04-13T06:57:35Z"
      },
      {
        "priority": "--",
        "id": 1771139,
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "creation_time": "2022-05-25T11:50:46Z",
        "severity": "S4",
        "component": "Graphics: Canvas2D",
        "last_change_time": "2023-12-21T12:37:20Z",
        "summary": "6.79 - 3.07% google-docs-canvas LastVisualChange / google-docs-canvas FirstVisualChange + 1 more (Linux) regression on Fri May 20 2022",
        "status": "NEW"
      },
      {
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "id": 1800133,
        "priority": "P2",
        "creation_time": "2022-11-10T18:58:44Z",
        "severity": "S3",
        "status": "REOPENED",
        "summary": "16.22 - 12.09% displaylist_mutate / displaylist_mutate + 4 more (Linux, OSX, Windows) regression on Sun November 6 2022",
        "last_change_time": "2024-04-03T02:40:30Z",
        "component": "Graphics: WebRender"
      },
      {
        "component": "Graphics: WebGPU",
        "summary": "12.07 - 10.81% perf_reftest_singletons bloom-basic-2.html / perf_reftest_singletons bloom-basic-2.html + 1 more (OSX) regression on Thu December 22 2022",
        "status": "NEW",
        "last_change_time": "2024-03-21T20:20:06Z",
        "id": 1807935,
        "priority": "P2",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "severity": "--",
        "creation_time": "2022-12-29T15:37:47Z"
      },
      {
        "last_change_time": "2023-06-18T00:31:00Z",
        "status": "NEW",
        "summary": "4.45% perf_reftest_singletons bidi-resolution-1.html (Linux) regression on Wed March 15 2023",
        "component": "Graphics: Canvas2D",
        "keywords": [
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "op_sys": "Linux",
        "priority": "--",
        "id": 1825403,
        "creation_time": "2023-03-29T19:13:51Z",
        "severity": "S3"
      },
      {
        "id": 1827167,
        "priority": "P2",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "creation_time": "2023-04-10T06:48:08Z",
        "severity": "S3",
        "component": "Search",
        "summary": "1.03 - 1.02% Base Content JS / Base Content JS + 2 more (Linux, OSX, Windows) regression on Mon April 3 2023",
        "status": "NEW",
        "last_change_time": "2023-05-23T14:54:15Z"
      },
      {
        "component": "JavaScript Engine",
        "status": "ASSIGNED",
        "summary": "2.02% Base Content Heap Unclassified (Windows) regression on Mon May 8 2023",
        "last_change_time": "2023-08-01T16:45:12Z",
        "id": 1833078,
        "priority": "P3",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "severity": "S3",
        "creation_time": "2023-05-15T06:47:03Z"
      },
      {
        "component": "CSS Parsing and Computation",
        "last_change_time": "2023-07-11T02:35:25Z",
        "summary": "4.81 - 4.27% stylebench / stylebench (Windows) regression on Thu June 8 2023",
        "status": "NEW",
        "severity": "S3",
        "creation_time": "2023-06-21T12:03:19Z",
        "priority": "--",
        "id": 1839620,
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified"
      },
      {
        "priority": "P1",
        "id": 1842437,
        "keywords": [
          "perf-alert",
          "regression",
          "webcompat:contact-ready",
          "webcompat:site-report",
          "webcompat:sitepatch-applied"
        ],
        "op_sys": "Unspecified",
        "creation_time": "2023-07-09T11:32:20Z",
        "severity": "S2",
        "component": "Site Reports",
        "last_change_time": "2026-03-02T15:47:18Z",
        "status": "REOPENED",
        "summary": "Youtube back navigation has started to fail again in new tabs."
      },
      {
        "last_change_time": "2023-07-18T23:54:10Z",
        "status": "NEW",
        "summary": "0.11% installer size (OSX) regression on Wed July 5 2023",
        "component": "Gecko Profiler",
        "keywords": [
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "priority": "P3",
        "id": 1842590,
        "creation_time": "2023-07-10T12:29:54Z",
        "severity": "S3"
      },
      {
        "creation_time": "2023-07-11T09:05:48Z",
        "severity": "S3",
        "keywords": [
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "priority": "P3",
        "id": 1842759,
        "last_change_time": "2023-08-04T01:53:30Z",
        "status": "NEW",
        "summary": "2.7 - 2.67% compiler_metrics num_static_constructors / compiler_metrics num_static_constructors + 2 more (Linux, Windows) regression on Wed July 5 2023",
        "component": "General"
      },
      {
        "last_change_time": "2023-11-23T10:58:47Z",
        "status": "NEW",
        "summary": "6.33% google-maps loadtime (Android) regression on Sun July 9 2023",
        "component": "CSS Parsing and Computation",
        "severity": "S3",
        "creation_time": "2023-07-19T07:29:21Z",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Android",
        "priority": "P3",
        "id": 1844274
      },
      {
        "status": "NEW",
        "summary": "32.47 - 8.33% twitch SpeedIndex / reddit ContentfulSpeedIndex + 5 more (Linux, OSX, Windows) regression on Thu August 3 2023",
        "last_change_time": "2025-03-11T08:50:41Z",
        "component": "Translations",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "id": 1848291,
        "priority": "--",
        "creation_time": "2023-08-11T08:18:12Z",
        "severity": "S3"
      },
      {
        "component": "Internationalization",
        "last_change_time": "2023-12-12T08:20:25Z",
        "summary": "10.43 - 5.31% wikipedia loadtime / wikipedia fcp + 3 more (OSX) regression on Mon August 7 2023",
        "status": "NEW",
        "priority": "P1",
        "id": 1848354,
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "severity": "S3",
        "creation_time": "2023-08-11T14:21:07Z"
      },
      {
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "priority": "--",
        "id": 1849155,
        "creation_time": "2023-08-17T13:50:50Z",
        "severity": "S3",
        "last_change_time": "2023-09-07T15:29:55Z",
        "summary": "2.04 - 1.95% google-mail FirstVisualChange / google-mail FirstVisualChange (Windows) regression on Tue August 8 2023",
        "status": "NEW",
        "component": "Translations"
      },
      {
        "priority": "--",
        "id": 1853641,
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "severity": "S3",
        "creation_time": "2023-09-18T08:54:45Z",
        "component": "Inspector: Rules",
        "last_change_time": "2023-09-19T15:35:59Z",
        "summary": "Investigate unexpected DAMP tests improvement",
        "status": "ASSIGNED"
      },
      {
        "id": 1853858,
        "priority": "--",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "severity": "--",
        "creation_time": "2023-09-19T07:32:00Z",
        "component": "Widget: Gtk",
        "status": "NEW",
        "summary": "9.16 - 3.75% facebook LastVisualChange / yahoo-mail SpeedIndex + 1 more (Linux) regression on Thu September 14 2023",
        "last_change_time": "2023-12-21T12:05:47Z"
      },
      {
        "last_change_time": "2023-09-20T22:28:44Z",
        "status": "NEW",
        "summary": "3.38% yahoo-mail SpeedIndex (Linux) regression on Thu September 14 2023",
        "component": "Widget: Gtk",
        "creation_time": "2023-09-20T06:58:57Z",
        "severity": "--",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "priority": "--",
        "id": 1854057
      },
      {
        "component": "CSS Parsing and Computation",
        "summary": "0.27% installer size (OSX) regression on Fri September 15 2023",
        "status": "NEW",
        "last_change_time": "2023-11-28T20:55:19Z",
        "id": 1854401,
        "priority": "--",
        "op_sys": "Unspecified",
        "keywords": [
          "perf-alert",
          "regression"
        ],
        "severity": "S3",
        "creation_time": "2023-09-21T14:51:44Z"
      },
      {
        "component": "Performance",
        "summary": "Beta 119 Performance changes when we unset EARLY_BETA_OR_EARLIER",
        "status": "NEW",
        "last_change_time": "2023-12-27T18:55:54Z",
        "id": 1858604,
        "priority": "P5",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "severity": "S3",
        "creation_time": "2023-10-12T07:04:43Z"
      },
      {
        "component": "Performance",
        "status": "NEW",
        "summary": "17.63 - 8.9% assorted-dom / assorted-dom (Linux) regression on Fri October 13 2023",
        "last_change_time": "2025-05-05T02:09:30Z",
        "creation_time": "2023-10-19T20:23:19Z",
        "severity": "S3",
        "id": 1860168,
        "priority": "P2",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ]
      },
      {
        "component": "Performance",
        "last_change_time": "2023-12-27T18:55:54Z",
        "summary": "Beta 120 Performance changes when we unset EARLY_BETA_OR_EARLIER",
        "status": "NEW",
        "creation_time": "2023-10-31T14:17:03Z",
        "severity": "S3",
        "priority": "P5",
        "id": 1862221,
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified"
      },
      {
        "creation_time": "2023-11-21T14:07:09Z",
        "severity": "S4",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "id": 1865831,
        "priority": "--",
        "status": "NEW",
        "summary": "11.66 - 2.62% facebook-cristiano ContentfulSpeedIndex / paypal loadtime + 2 more (Android, Windows) regression on Tue November 14 2023",
        "last_change_time": "2023-12-18T13:18:10Z",
        "component": "DOM: Navigation"
      },
      {
        "priority": "P3",
        "id": 1866783,
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "severity": "S4",
        "creation_time": "2023-11-27T13:19:35Z",
        "component": "DOM: Core & HTML",
        "last_change_time": "2025-03-20T19:32:49Z",
        "summary": "3.22 - 2.04% Base Content Heap Unclassified / Base Content Heap Unclassified + 1 more (Linux, Windows) regression on Tue November 21 2023",
        "status": "NEW"
      },
      {
        "creation_time": "2023-12-01T21:17:36Z",
        "severity": "S3",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "id": 1867868,
        "priority": "P5",
        "status": "NEW",
        "summary": "Beta 121 Performance changes when we unset EARLY_BETA_OR_EARLIER",
        "last_change_time": "2024-01-16T10:43:21Z",
        "component": "Performance"
      },
      {
        "id": 1869244,
        "priority": "P3",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "severity": "S3",
        "creation_time": "2023-12-11T09:39:23Z",
        "component": "Console",
        "summary": "17.93 - 12.89% damp console.autocomplete.longInput / damp console.autocomplete.longInput + 8 more (Linux, OSX, Windows) regression on Tue November 14 2023",
        "status": "NEW",
        "last_change_time": "2024-01-09T13:28:05Z"
      },
      {
        "last_change_time": "2024-02-06T16:33:40Z",
        "status": "NEW",
        "summary": "1.94 - 1.83% compiler_metrics num_static_constructors / compiler_metrics num_static_constructors (Windows) regression on Fri December 8 2023",
        "component": "Audio/Video",
        "creation_time": "2023-12-14T16:17:57Z",
        "severity": "S3",
        "keywords": [
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "priority": "P3",
        "id": 1870074
      },
      {
        "component": "Performance: General",
        "last_change_time": "2024-03-14T19:23:27Z",
        "summary": "30 - 6.86% perf_reftest_singletons getElementById-1.html / perf_reftest_singletons attr-selector-1.html + 3 more (Linux) regression on Fri December 8 2023",
        "status": "NEW",
        "priority": "P3",
        "id": 1870279,
        "keywords": [
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "op_sys": "Unspecified",
        "creation_time": "2023-12-15T15:13:33Z",
        "severity": "S4"
      },
      {
        "severity": "S3",
        "creation_time": "2023-12-19T16:16:00Z",
        "id": 1870869,
        "priority": "P2",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "component": "Graphics: Canvas2D",
        "summary": "13.66 - 6.8% canvas2dvideo Mean tick time across 100 ticks:  / canvas2dvideo Mean tick time across 100 ticks:  + 1 more (Windows) regression on Thu December 7 2023",
        "status": "NEW",
        "last_change_time": "2024-01-19T16:06:37Z"
      },
      {
        "last_change_time": "2024-02-07T14:42:17Z",
        "status": "NEW",
        "summary": "8.16 - 3.36% compiler_metrics num_static_constructors / compiler_metrics num_static_constructors + 2 more (Linux, OSX) regression on Tue December 19 2023",
        "component": "Audio/Video",
        "creation_time": "2023-12-27T14:24:08Z",
        "severity": "S4",
        "keywords": [
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "priority": "--",
        "id": 1872152
      },
      {
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "id": 1872172,
        "priority": "P5",
        "creation_time": "2023-12-27T18:55:54Z",
        "severity": "S3",
        "summary": "Beta 122 Performance changes when we unset EARLY_BETA_OR_EARLIER",
        "status": "NEW",
        "last_change_time": "2026-02-12T13:29:52Z",
        "component": "Performance"
      },
      {
        "component": "Inspector: Rules",
        "status": "NEW",
        "summary": "3.55 - 2.25% damp console.typing / damp console.autocomplete.longInput + 3 more (Windows) regression on Thu January 11 2024",
        "last_change_time": "2024-01-16T16:47:02Z",
        "id": 1874648,
        "priority": "P3",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "severity": "S3",
        "creation_time": "2024-01-15T08:09:32Z"
      },
      {
        "severity": "S3",
        "creation_time": "2024-01-19T13:05:49Z",
        "id": 1875468,
        "priority": "P3",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "component": "Debugger",
        "status": "NEW",
        "summary": "17.06 - 4.16% damp custom.styleeditor.close.DAMP / damp custom.styleeditor.open.DAMP + 9 more (Linux, Windows) regression on Mon January 15 2024",
        "last_change_time": "2024-05-20T14:59:31Z"
      },
      {
        "severity": "S3",
        "creation_time": "2024-01-19T13:22:12Z",
        "id": 1875471,
        "priority": "P2",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "component": "Debugger",
        "status": "NEW",
        "summary": "39.34 - 4.63% damp custom.pretty-print.jsdebugger.reload.DAMP / damp server.protocoljs.DAMP + 5 more (Linux, Windows) regression on Tue January 16 2024",
        "last_change_time": "2024-03-05T16:35:21Z"
      },
      {
        "component": "Inspector: Rules",
        "last_change_time": "2024-04-15T17:25:45Z",
        "summary": "23.2 - 2.91% damp custom.inspector.collapseall.manychildren / damp custom.inspector.close.DAMP + 9 more (Linux, OSX, Windows) regression on Tue January 30 2024",
        "status": "NEW",
        "priority": "P2",
        "id": 1878614,
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "creation_time": "2024-02-05T09:14:03Z",
        "severity": "S3"
      },
      {
        "priority": "P2",
        "id": 1879653,
        "keywords": [
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "creation_time": "2024-02-09T21:18:54Z",
        "severity": "S3",
        "component": "Source Editor",
        "last_change_time": "2024-02-14T10:36:26Z",
        "status": "NEW",
        "summary": "0.21% installer size (OSX) regression on Thu February 8 2024"
      },
      {
        "creation_time": "2024-03-04T08:37:03Z",
        "severity": "--",
        "priority": "--",
        "id": 1883308,
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "component": "Widget: Gtk",
        "last_change_time": "2024-04-01T16:23:26Z",
        "summary": "28.5 - 8.25% damp console.typing / damp console.autocomplete + 2 more (Linux) regression on Wed February 28 2024",
        "status": "NEW"
      },
      {
        "severity": "S3",
        "creation_time": "2024-03-21T15:00:54Z",
        "id": 1886780,
        "priority": "--",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "component": "CSS Parsing and Computation",
        "summary": "5.61 - 5.19% perf_reftest_singletons many-custom-props.html / perf_reftest_singletons many-custom-props.html (OSX) regression on Mon March 11 2024",
        "status": "NEW",
        "last_change_time": "2024-10-22T21:10:57Z"
      },
      {
        "creation_time": "2024-04-09T15:30:04Z",
        "severity": "S4",
        "keywords": [
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "op_sys": "Unspecified",
        "priority": "P5",
        "id": 1890573,
        "last_change_time": "2024-07-11T12:36:06Z",
        "summary": "3.47% twinopen ext+twinopen:twinopen.html (OSX) regression on Sat March 30 2024",
        "status": "NEW",
        "component": "Widget: Cocoa"
      },
      {
        "component": "Debugger",
        "last_change_time": "2024-05-06T09:56:54Z",
        "summary": "19.88% damp custom.jsdebugger.preview.DAMP (Windows) regression on Thu April 4 2024",
        "status": "NEW",
        "priority": "P3",
        "id": 1892244,
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "severity": "S3",
        "creation_time": "2024-04-18T14:19:28Z"
      },
      {
        "summary": "6.16 - 6.12% compiler_metrics num_static_constructors / compiler_metrics num_static_constructors (Windows) regression on Thu April 25 2024",
        "status": "NEW",
        "last_change_time": "2024-05-09T10:29:38Z",
        "component": "Audio/Video",
        "creation_time": "2024-04-30T16:21:41Z",
        "severity": "S4",
        "op_sys": "Unspecified",
        "keywords": [
          "perf-alert",
          "regression"
        ],
        "id": 1894281,
        "priority": "P5"
      },
      {
        "op_sys": "Unspecified",
        "keywords": [
          "perf-alert",
          "regression"
        ],
        "id": 1894283,
        "priority": "--",
        "severity": "S3",
        "creation_time": "2024-04-30T16:23:16Z",
        "summary": "1.94 - 1.92% compiler_metrics num_static_constructors / compiler_metrics num_static_constructors (Windows) regression on Mon April 29 2024",
        "status": "NEW",
        "last_change_time": "2024-05-09T11:16:28Z",
        "component": "Audio/Video"
      },
      {
        "component": "CSS Transitions and Animations",
        "last_change_time": "2024-07-18T07:39:16Z",
        "status": "NEW",
        "summary": "41.52 - 20.11% google-maps LastVisualChange / google-maps LastVisualChange (Android) regression on Wed April 17 2024",
        "priority": "--",
        "id": 1894368,
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "creation_time": "2024-04-30T21:33:07Z",
        "severity": "S4"
      },
      {
        "creation_time": "2024-05-14T18:57:56Z",
        "severity": "S3",
        "priority": "--",
        "id": 1896729,
        "keywords": [
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "op_sys": "Unspecified",
        "component": "String",
        "last_change_time": "2024-06-06T18:58:57Z",
        "status": "NEW",
        "summary": "15.35 - 9.97% perf_reftest_singletons external-string-pass.html / perf_reftest_singletons external-string-pass.html (OSX) regression on Thu May 9 2024"
      },
      {
        "component": "Session Restore",
        "last_change_time": "2024-06-04T15:41:53Z",
        "status": "NEW",
        "summary": "5.78 - 2.23% outlook ContentfulSpeedIndex / outlook SpeedIndex + 2 more (Linux, Windows) regression on Tue May 7 2024",
        "priority": "--",
        "id": 1897076,
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "creation_time": "2024-05-16T07:30:13Z",
        "severity": "S3"
      },
      {
        "component": "Performance",
        "summary": "1.36 - 1.36% installer size / installer size (OSX) regression on Mon May 13 2024",
        "status": "NEW",
        "last_change_time": "2024-12-11T07:57:37Z",
        "id": 1898148,
        "priority": "P5",
        "op_sys": "Unspecified",
        "keywords": [
          "perf-alert",
          "regression"
        ],
        "severity": "S4",
        "creation_time": "2024-05-22T06:57:11Z"
      },
      {
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "id": 1903756,
        "priority": "P5",
        "creation_time": "2024-06-20T10:59:29Z",
        "severity": "S4",
        "status": "NEW",
        "summary": "28.85 - 10.25% tsvgx / tsvgx + 4 more (Linux, OSX, Windows) regression on Mon June 10 2024",
        "last_change_time": "2024-08-22T17:43:24Z",
        "component": "Talos"
      },
      {
        "creation_time": "2024-07-04T16:04:57Z",
        "severity": "S3",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "id": 1906325,
        "priority": "--",
        "summary": "4.28 - 2.3% google-slides LastVisualChange / google-slides LastVisualChange + 5 more (OSX, Windows) regression on Tue June 25 2024",
        "status": "NEW",
        "last_change_time": "2024-09-21T04:41:04Z",
        "component": "Graphics: WebRender"
      },
      {
        "component": "Tabbed Browser",
        "status": "NEW",
        "summary": "3.04 - 2.06% tart / tart + 2 more (OSX, Windows) regression on Wed June 26 2024",
        "last_change_time": "2024-08-23T21:22:37Z",
        "id": 1906353,
        "priority": "P3",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "creation_time": "2024-07-04T18:41:02Z",
        "severity": "S4"
      },
      {
        "creation_time": "2024-07-22T21:11:05Z",
        "severity": "S4",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "id": 1909338,
        "priority": "P2",
        "summary": "2.15 - 1.65% tart / tart (Windows) regression on Tue July 9 2024",
        "status": "NEW",
        "last_change_time": "2024-09-12T16:56:08Z",
        "component": "Theme"
      },
      {
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "priority": "--",
        "id": 1909836,
        "severity": "S3",
        "creation_time": "2024-07-25T09:44:13Z",
        "last_change_time": "2025-03-11T08:51:43Z",
        "status": "NEW",
        "summary": "11.17 - 2.96% reddit SpeedIndex / reddit loadtime + 2 more (Linux, OSX, Windows) regression on Sat July 20 2024",
        "component": "Layout"
      },
      {
        "keywords": [
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "priority": "P5",
        "id": 1911742,
        "creation_time": "2024-08-06T09:10:39Z",
        "severity": "S4",
        "last_change_time": "2024-12-11T07:56:08Z",
        "summary": "22.47% decision () regression on Mon July 29 2024",
        "status": "NEW",
        "component": "Performance"
      },
      {
        "status": "NEW",
        "summary": "8.65 - 5.66% damp jstracer.server-performance.DAMP / damp jstracer.webconsole-performance.DAMP + 2 more (Linux) regression on Fri August 2 2024",
        "last_change_time": "2024-08-22T10:08:37Z",
        "component": "Debugger",
        "op_sys": "Unspecified",
        "keywords": [
          "devtools-perf-regression",
          "perf",
          "perf-alert",
          "regression"
        ],
        "id": 1912968,
        "priority": "P3",
        "severity": "S3",
        "creation_time": "2024-08-13T14:40:45Z"
      },
      {
        "severity": "S4",
        "creation_time": "2024-08-14T14:18:38Z",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "id": 1913159,
        "priority": "P3",
        "status": "NEW",
        "summary": "0.28 - 0.27% Base Content JS / Base Content JS (OSX, Windows) regression on Wed August 7 2024",
        "last_change_time": "2024-08-28T15:37:13Z",
        "component": "JavaScript Engine"
      },
      {
        "severity": "S3",
        "creation_time": "2024-08-23T06:57:37Z",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "priority": "--",
        "id": 1914554,
        "last_change_time": "2024-10-10T20:15:35Z",
        "summary": "Regression on SP3-Charts-observable-plot around 21Aug2024",
        "status": "NEW",
        "component": "SVG"
      },
      {
        "last_change_time": "2024-11-05T17:01:55Z",
        "status": "REOPENED",
        "summary": "14 - 2.61% speedometer3 React-Stockcharts-SVG/total + 17 more (Linux, OSX, Windows) regression on Tue August 27 2024",
        "component": "SVG",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "priority": "--",
        "id": 1917560,
        "creation_time": "2024-09-09T10:42:04Z",
        "severity": "S3"
      },
      {
        "status": "NEW",
        "summary": "0.5 - 0.22% installer size / installer size + 4 more (OSX) regression on Wed September 11 2024",
        "last_change_time": "2024-09-20T21:01:06Z",
        "component": "Graphics: CanvasWebGL",
        "op_sys": "Unspecified",
        "keywords": [
          "perf-alert",
          "regression"
        ],
        "id": 1918406,
        "priority": "P3",
        "creation_time": "2024-09-12T13:49:39Z",
        "severity": "S3"
      },
      {
        "keywords": [
          "backlog-deferred",
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "priority": "P5",
        "id": 1927807,
        "creation_time": "2024-10-29T15:39:05Z",
        "severity": "S4",
        "last_change_time": "2025-02-02T16:40:29Z",
        "summary": "%X- %Y regression testing bug",
        "status": "REOPENED",
        "component": "Raptor"
      },
      {
        "priority": "--",
        "id": 1939022,
        "keywords": [
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "severity": "--",
        "creation_time": "2024-12-24T12:28:44Z",
        "component": "Webext Storage",
        "last_change_time": "2025-01-24T15:17:18Z",
        "summary": "0.64% installer size (Windows) regression on Fri December 20 2024",
        "status": "NEW"
      },
      {
        "component": "Webext Storage",
        "status": "NEW",
        "summary": "1.03 - 0.79% installer size / installer size + 2 more (Linux, OSX) regression on Sat December 21 2024",
        "last_change_time": "2025-02-04T09:44:44Z",
        "id": 1939258,
        "priority": "--",
        "op_sys": "Unspecified",
        "keywords": [
          "perf-alert",
          "regression"
        ],
        "severity": "--",
        "creation_time": "2024-12-27T12:28:49Z"
      },
      {
        "creation_time": "2025-01-03T16:14:07Z",
        "severity": "S3",
        "keywords": [
          "backlog-deferred",
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "priority": "P3",
        "id": 1939888,
        "last_change_time": "2025-02-15T17:05:00Z",
        "status": "NEW",
        "summary": "12.44% Heap Unclassified Fresh start [+30s] (Linux) regression on Wed October 30 2024",
        "component": "Layout"
      },
      {
        "component": "DOM: Events",
        "status": "ASSIGNED",
        "summary": "6.51 - 4.77% speedometer3 TodoMVC-Svelte-Complex-DOM/DeletingAllItems/Sync / speedometer3 TodoMVC-Svelte-Complex-DOM/DeletingAllItems/Sync (Linux) regression on Wed January 15 2025",
        "last_change_time": "2025-04-22T17:54:51Z",
        "id": 1943071,
        "priority": "--",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "creation_time": "2025-01-22T15:10:50Z",
        "severity": "S3"
      },
      {
        "creation_time": "2025-01-27T15:46:24Z",
        "severity": "S3",
        "op_sys": "Unspecified",
        "keywords": [
          "backlog-deferred",
          "perf",
          "perf-alert",
          "regression"
        ],
        "id": 1944005,
        "priority": "--",
        "status": "NEW",
        "summary": "2.73% google-search LastVisualChange (Linux) regression on Fri January 17 2025",
        "last_change_time": "2025-10-20T20:34:03Z",
        "component": "Memory Allocator"
      },
      {
        "severity": "S3",
        "creation_time": "2025-01-28T12:01:57Z",
        "op_sys": "Unspecified",
        "keywords": [
          "devtools-perf-regression",
          "perf",
          "perf-alert"
        ],
        "id": 1944270,
        "priority": "P3",
        "status": "NEW",
        "summary": "8.95% damp source-map.SourceMapGenerator-toString.DAMP (Windows) regression on Tue January 21 2025",
        "last_change_time": "2025-01-31T02:52:29Z",
        "component": "Debugger"
      },
      {
        "op_sys": "Unspecified",
        "keywords": [
          "backlog-deferred",
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "id": 1955585,
        "priority": "P3",
        "severity": "S4",
        "creation_time": "2025-03-21T12:04:29Z",
        "summary": "3.54% startup_about_home_paint_cached (Windows) regression on Mon March 17 2025",
        "status": "NEW",
        "last_change_time": "2026-02-23T06:47:21Z",
        "component": "New Tab Page"
      },
      {
        "last_change_time": "2025-05-08T19:45:39Z",
        "status": "NEW",
        "summary": "56.17 - 6.08% pdfpaint issue12295.pdf / pdfpaint issue17981.pdf + 23 more (Linux, OSX, Windows) regression on Mon March 24 2025",
        "component": "PDF Viewer",
        "severity": "S3",
        "creation_time": "2025-04-03T12:50:35Z",
        "keywords": [
          "backlog-deferred",
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "op_sys": "Unspecified",
        "priority": "P3",
        "id": 1958264
      },
      {
        "severity": "--",
        "creation_time": "2025-04-04T17:50:32Z",
        "keywords": [
          "backlog-deferred",
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Android",
        "priority": "--",
        "id": 1958554,
        "last_change_time": "2025-09-18T16:19:15Z",
        "status": "NEW",
        "summary": "777.23 - 2.98% background-resource cpuTime-total-backgrounding-diff / applink-startup-first-frame cold_main_first_frame.median + 101 more (Android) regression on Thu March 27 2025",
        "component": "Homepage"
      },
      {
        "summary": "8.99 - 6.11% pdfpaint issue12295.pdf / pdfpaint issue12810.pdf + 5 more (Linux, Windows) regression on Thu March 27 2025",
        "status": "NEW",
        "last_change_time": "2026-03-16T07:04:11Z",
        "component": "PDF Viewer",
        "op_sys": "Unspecified",
        "keywords": [
          "backlog-deferred",
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "id": 1958555,
        "priority": "P3",
        "creation_time": "2025-04-04T17:57:15Z",
        "severity": "S3"
      },
      {
        "component": "Layout: Positioned",
        "summary": "5.35% perf_reftest_singletons insert-nth-edge-has-pseudo.html (Linux) regression on Tue April 8 2025",
        "status": "ASSIGNED",
        "last_change_time": "2025-04-29T13:07:46Z",
        "id": 1960338,
        "priority": "--",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "severity": "S3",
        "creation_time": "2025-04-14T12:37:56Z"
      },
      {
        "priority": "P1",
        "id": 1968988,
        "keywords": [
          "backlog-deferred",
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Android",
        "severity": "S2",
        "creation_time": "2025-05-28T15:47:20Z",
        "component": "General",
        "last_change_time": "2025-10-23T19:46:04Z",
        "status": "NEW",
        "summary": "32.59 - 2.04% bing-search-restaurants FirstVisualChange / youtube LastVisualChange + 79 more (Android) regression on Mon May 19 2025"
      },
      {
        "severity": "--",
        "creation_time": "2025-06-02T11:27:25Z",
        "priority": "--",
        "id": 1969857,
        "keywords": [
          "backlog-deferred",
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Android",
        "component": "DOM: Navigation",
        "last_change_time": "2025-11-08T13:38:35Z",
        "summary": "12.28 - 5.38% espn loadtime / bild-de LastVisualChange + 2 more (Android) regression on Mon May 19 2025",
        "status": "NEW"
      },
      {
        "component": "Tooling",
        "last_change_time": "2025-11-20T18:07:31Z",
        "summary": "431.72 - 4.14% background-resource pss-tab-backgrounding-diff / foreground-resource rss-main-50% + 3 more (Android) regression on Thu May 29 2025",
        "status": "NEW",
        "severity": "S3",
        "creation_time": "2025-06-13T06:44:40Z",
        "priority": "--",
        "id": 1971936,
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Android"
      },
      {
        "component": "Search",
        "last_change_time": "2026-02-18T20:12:17Z",
        "summary": "7.31 - 5.26% baseline-profile:fenix cold_startup.no_baseline.minimum / baseline-profile:fenix cold_startup.baseline.maximum + 1 more (Android) regression on Sat June 7 2025",
        "status": "ASSIGNED",
        "creation_time": "2025-06-16T12:19:22Z",
        "severity": "S3",
        "priority": "--",
        "id": 1972310,
        "keywords": [
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "op_sys": "Android"
      },
      {
        "status": "ASSIGNED",
        "summary": "23.09 - 4.67% expedia ContentfulSpeedIndex / fandom SpeedIndex + 5 more (Linux, OSX) regression on Sun June 29 2025",
        "last_change_time": "2025-09-18T15:19:43Z",
        "component": "Panning and Zooming",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "id": 1975418,
        "priority": "P2",
        "severity": "S3",
        "creation_time": "2025-07-03T11:14:42Z"
      },
      {
        "last_change_time": "2025-10-23T09:52:07Z",
        "summary": "1500 - 12.69% background-resource cpuTime-crashhelper-background-diff / foreground-resource rss-crashhelper-start + 18 more (Android) regression on Fri July 4 2025",
        "status": "NEW",
        "component": "Performance",
        "creation_time": "2025-07-10T09:17:30Z",
        "severity": "S4",
        "keywords": [
          "backlog-deferred",
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "op_sys": "Android",
        "priority": "P3",
        "id": 1976641
      },
      {
        "creation_time": "2025-07-11T16:23:26Z",
        "severity": "S2",
        "id": 1976928,
        "priority": "P3",
        "op_sys": "Android",
        "keywords": [
          "backlog-deferred",
          "perf",
          "perf-alert",
          "regression"
        ],
        "component": "General",
        "status": "NEW",
        "summary": "8.82 - 2.79% vpl-h264 estimatedAnyFrameLatency / vpl-h264 lastFrame + 19 more (Android) regression on Fri July 4 2025",
        "last_change_time": "2025-10-02T08:28:55Z"
      },
      {
        "component": "General",
        "summary": "Large number of static constructors with GCC 10",
        "status": "NEW",
        "last_change_time": "2026-03-16T13:45:34Z",
        "id": 1984677,
        "priority": "P3",
        "op_sys": "Unspecified",
        "keywords": [
          "perf-alert",
          "regression"
        ],
        "severity": "--",
        "creation_time": "2025-08-22T14:32:46Z"
      },
      {
        "keywords": [
          "backlog-deferred",
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "priority": "--",
        "id": 1985793,
        "creation_time": "2025-08-28T14:17:52Z",
        "severity": "--",
        "last_change_time": "2025-09-17T10:40:40Z",
        "summary": "6.2% bing-search loadtime (OSX) regression on Tue August 19 2025",
        "status": "NEW",
        "component": "New Tab Page"
      },
      {
        "creation_time": "2025-10-09T14:08:20Z",
        "severity": "S3",
        "id": 1993498,
        "priority": "P3",
        "op_sys": "Unspecified",
        "keywords": [
          "devtools-perf-regression",
          "perf",
          "perf-alert",
          "regression"
        ],
        "component": "General",
        "status": "NEW",
        "summary": "249.79% target:parent-process memory (Linux) regression on Fri September 19 2025",
        "last_change_time": "2025-11-18T16:53:31Z"
      },
      {
        "component": "Tooling & Investigations",
        "status": "NEW",
        "summary": "4.57 - 4.18% browser_translations_perf_tiny.js post-gc-parent-process-memory-usage / browser_translations_perf_basememory.js post-gc-parent-process-memory-usage + 8 more (Linux, Windows) regression on Sun October 26 2025",
        "last_change_time": "2025-11-03T13:46:22Z",
        "id": 1997898,
        "priority": "--",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "creation_time": "2025-11-03T12:03:54Z",
        "severity": "--"
      },
      {
        "severity": "S3",
        "creation_time": "2025-11-14T16:46:57Z",
        "priority": "--",
        "id": 2000258,
        "keywords": [
          "backlog-deferred",
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "op_sys": "Unspecified",
        "component": "CSS Parsing and Computation",
        "last_change_time": "2025-12-01T14:20:05Z",
        "status": "NEW",
        "summary": "5.53 - 5.32% perf_reftest_singletons nth-index-1.html / perf_reftest_singletons nth-index-2.html (Linux) regression."
      },
      {
        "component": "Theme",
        "summary": "493.96 - 2.04% tp5o_scroll / startup_about_home_paint_cached + 7 more (Linux) regression on Fri January 30 2026",
        "status": "NEW",
        "last_change_time": "2026-03-12T09:37:57Z",
        "id": 2014122,
        "priority": "P1",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "creation_time": "2026-02-03T12:31:51Z",
        "severity": "S3"
      },
      {
        "summary": "8.83 - 8.19% pdfpaint bug1749563.pdf / pdfpaint bug1795263.pdf + 1 more (Linux) regression on Sat February 7 2026",
        "status": "NEW",
        "last_change_time": "2026-03-16T09:15:23Z",
        "component": "PDF Viewer",
        "creation_time": "2026-02-11T14:58:03Z",
        "severity": "S3",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "id": 2016122,
        "priority": "P3"
      },
      {
        "severity": "S3",
        "creation_time": "2026-02-12T14:21:57Z",
        "id": 2016438,
        "priority": "P3",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "component": "Storage: IndexedDB",
        "summary": "55.08 - 50.08% idb-open-few-seq delete_duration / idb-open-few-par delete_duration (Windows) regression on Fri February 6 2026",
        "status": "NEW",
        "last_change_time": "2026-03-10T15:44:20Z"
      },
      {
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Android",
        "priority": "--",
        "id": 2016452,
        "severity": "--",
        "creation_time": "2026-02-12T15:14:15Z",
        "last_change_time": "2026-03-09T12:17:53Z",
        "status": "NEW",
        "summary": "2.99 - 2.02% speedometer3 NewsSite-Next/NavigateToPolitics/Sync / speedometer3 NewsSite-Next/NavigateToUS/Sync + 1 more (Android) regression on Fri January 30 2026",
        "component": "Performance"
      },
      {
        "severity": "--",
        "creation_time": "2026-02-25T10:59:53Z",
        "id": 2019234,
        "priority": "--",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "component": "PDF Viewer",
        "summary": "8.18 - 6% pdfpaint issue7872.pdf / pdfpaint bug1539074.1.pdf + 11 more (Linux) regression on Thu February 19 2026",
        "status": "NEW",
        "last_change_time": "2026-03-16T09:40:12Z"
      },
      {
        "priority": "--",
        "id": 2020567,
        "keywords": [
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "op_sys": "Unspecified",
        "severity": "S3",
        "creation_time": "2026-03-03T07:37:21Z",
        "component": "DOM: Core & HTML",
        "last_change_time": "2026-03-09T08:01:33Z",
        "summary": "13.35 - 6.46% perf_reftest coalesce-2.html + 2 more (Linux) regression on Tue February 24 2026",
        "status": "NEW"
      },
      {
        "last_change_time": "2026-03-13T09:08:07Z",
        "status": "NEW",
        "summary": "3.44 - 2.1% speedometer3 TodoMVC-Lit-Complex-DOM/CompletingAllItems/Async + 5 more (OSX) regression on Wed February 25 2026",
        "component": "Layout",
        "severity": "--",
        "creation_time": "2026-03-04T07:22:08Z",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "priority": "--",
        "id": 2020900
      },
      {
        "component": "Messaging System",
        "status": "NEW",
        "summary": "2.29% welcome ContentfulSpeedIndex (OSX) regression on Fri February 27 2026",
        "last_change_time": "2026-03-10T15:51:51Z",
        "id": 2020941,
        "priority": "--",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "severity": "--",
        "creation_time": "2026-03-04T11:28:58Z"
      },
      {
        "creation_time": "2026-03-04T13:29:33Z",
        "severity": "S3",
        "priority": "P3",
        "id": 2020981,
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "component": "Graphics: WebRender",
        "last_change_time": "2026-03-12T05:39:46Z",
        "summary": "39.23 - 4.23% bing-search FirstVisualChange + 12 more (Android, OSX) regression on Mon February 23 2026",
        "status": "NEW"
      },
      {
        "summary": "3.46% bing FirstVisualChange (Android) regression on Mon February 9 2026",
        "status": "NEW",
        "last_change_time": "2026-03-10T15:52:19Z",
        "component": "Homepage",
        "op_sys": "Android",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "id": 2021282,
        "priority": "--",
        "severity": "--",
        "creation_time": "2026-03-05T12:36:19Z"
      },
      {
        "summary": "21.02 - 7.25% pdfpaint issue14982.pdf + 5 more (Linux, OSX) regression on Mon March 2 2026",
        "status": "NEW",
        "last_change_time": "2026-03-10T18:21:14Z",
        "component": "PDF Viewer",
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression",
          "talos-regression"
        ],
        "id": 2021577,
        "priority": "--",
        "creation_time": "2026-03-06T13:33:22Z",
        "severity": "--"
      },
      {
        "component": "Performance Engineering",
        "last_change_time": "2026-03-12T04:46:18Z",
        "summary": "4.38 - 3.62% damp simple.netmonitor.exportHar + 1 more (Windows) regression on Wed March 4 2026",
        "status": "NEW",
        "severity": "--",
        "creation_time": "2026-03-11T14:43:11Z",
        "priority": "--",
        "id": 2022565,
        "keywords": [
          "devtools-perf-regression",
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified"
      },
      {
        "component": "Onboarding",
        "status": "NEW",
        "summary": "9.79% baseline-profile:fenix startupNone.ttid.median (Android) regression on Fri March 6 2026",
        "last_change_time": "2026-03-13T08:44:39Z",
        "creation_time": "2026-03-13T08:07:59Z",
        "severity": "--",
        "id": 2023084,
        "priority": "--",
        "op_sys": "Android",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ]
      },
      {
        "op_sys": "Unspecified",
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "id": 2023159,
        "priority": "P2",
        "severity": "S2",
        "creation_time": "2026-03-13T13:06:11Z",
        "summary": "28.4 - 15.12% ve-av1-q wallclock-for-tracking-only + 2 more (OSX) regression on Mon March 9 2026",
        "status": "NEW",
        "last_change_time": "2026-03-14T22:01:24Z",
        "component": "Audio/Video: Playback"
      },
      {
        "component": "Internationalization",
        "last_change_time": "2026-03-16T16:48:09Z",
        "summary": "50.3 - 25.05% jetstream3 cdjs-First + 24 more (Android, Linux, OSX, Windows) regression on Wed March 11 2026",
        "status": "ASSIGNED",
        "priority": "--",
        "id": 2023534,
        "keywords": [
          "perf",
          "perf-alert",
          "regression"
        ],
        "op_sys": "Unspecified",
        "severity": "--",
        "creation_time": "2026-03-16T10:50:02Z"
      }
    ]
  },
  "triageGeneral": {
    "bugs": [
      {
        "summary": "Compositor CSS animations are not paused in fully occluded windows",
        "status": "NEW",
        "id": 1771902
      },
      {
        "id": 1777875,
        "status": "NEW",
        "summary": "Lenovo Privacy Guard with \"Enable this feature when typing passwords\" causing excessive UI responsiveness delays (jank)"
      },
      {
        "id": 1931717,
        "summary": "[meta] High OOM rate and CC time in YouTube",
        "status": "NEW"
      },
      {
        "summary": "RAM too much",
        "status": "UNCONFIRMED",
        "id": 1939354
      },
      {
        "status": "NEW",
        "summary": "On a fresh profile, Negative heap-unclassified on \"My Bugs\" query on b.m.o",
        "id": 1941716
      },
      {
        "id": 1943419,
        "summary": "Fluidd memory leak",
        "status": "UNCONFIRMED"
      },
      {
        "status": "UNCONFIRMED",
        "summary": "Consume too much memory",
        "id": 1946913
      },
      {
        "summary": "Meta Messenger causing high CPU load",
        "status": "UNCONFIRMED",
        "id": 1949252
      },
      {
        "id": 1956850,
        "status": "NEW",
        "summary": "Ublock Origin increases the time to load a simple demo by 4x and uses ~3x more RAM (time spent in wrappercache, proxy, xraywrapper, minorGC and related stuff)"
      },
      {
        "id": 1959837,
        "status": "NEW",
        "summary": "openstreetmap iD editor - slow zooming"
      },
      {
        "status": "NEW",
        "summary": "x.com - Scroll lagging after performing a subsequent query",
        "id": 1964374
      },
      {
        "summary": "JS isn't minified in Fenix release builds",
        "status": "NEW",
        "id": 1966492
      },
      {
        "id": 1975348,
        "summary": "EspnCricInfo site creates massive CPU and Memory usage FF140.0.2",
        "status": "UNCONFIRMED"
      },
      {
        "id": 1988312,
        "status": "NEW",
        "summary": "www.pexels.com - Stuttering/choppy scroll"
      },
      {
        "id": 1988605,
        "summary": "Facebook search bar animation stutters on Firefox",
        "status": "UNCONFIRMED"
      },
      {
        "status": "UNCONFIRMED",
        "summary": "Tabs in Firefox refresh when multitasking",
        "id": 1988608
      },
      {
        "status": "NEW",
        "summary": "MutationObserver's getReceiverFor is slow when there are a lot of observers",
        "id": 1988776
      },
      {
        "id": 1993778,
        "status": "UNCONFIRMED",
        "summary": "Firefox causes MacBook battery to drain fast"
      },
      {
        "id": 1994231,
        "status": "UNCONFIRMED",
        "summary": "Search with bookmark keywords doesn't work when browser's lagging"
      },
      {
        "id": 1994817,
        "summary": "Firefox CPU usage spikes to 100%+ on some sites, particularly when opening new tabs",
        "status": "UNCONFIRMED"
      },
      {
        "id": 2001588,
        "status": "UNCONFIRMED",
        "summary": "Zooming in and out on https://www.tcm.com/schedule is slow"
      },
      {
        "summary": "145.0.1  hogs cpu",
        "status": "UNCONFIRMED",
        "id": 2001751
      },
      {
        "id": 2002153,
        "status": "UNCONFIRMED",
        "summary": "Laggy Youtube in-Video UI"
      },
      {
        "status": "REOPENED",
        "summary": "Horrible new tab bar",
        "id": 2002795
      },
      {
        "status": "UNCONFIRMED",
        "summary": "chase.com - 145.0.2 is incompatible with Chase Online Banking features",
        "id": 2003583
      },
      {
        "status": "UNCONFIRMED",
        "summary": "High ram usage in Youtube site when uBlock Origin is enabled.",
        "id": 2005548
      },
      {
        "id": 2005635,
        "status": "UNCONFIRMED",
        "summary": "decathlon.fr website consuming CPU while not displayed"
      },
      {
        "id": 2006540,
        "status": "UNCONFIRMED",
        "summary": "Extensions Using 150% CPU During Normal Browsing"
      },
      {
        "summary": "\"This page is slowing down Firefox. To speed up your browser, stop this page.\" error",
        "status": "UNCONFIRMED",
        "id": 2007610
      },
      {
        "id": 2008564,
        "summary": "UI freezes on long React/DOM sessions despite moderate CPU usage (main-thread JS long tasks)",
        "status": "UNCONFIRMED"
      },
      {
        "id": 2008927,
        "summary": "Choppy/stuttering scrolling with touchpad",
        "status": "UNCONFIRMED"
      },
      {
        "id": 2011874,
        "status": "NEW",
        "summary": "hilversum.bestuurlijkeinformatie.nl - Unable to load the PDF, page is slowing down"
      },
      {
        "summary": "Link previews becomes stuck with constant high CPU usage until process killed",
        "status": "UNCONFIRMED",
        "id": 2015370
      },
      {
        "summary": "Migrate Android PGO training to native arm64 emulator",
        "status": "NEW",
        "id": 2016986
      },
      {
        "id": 2018136,
        "summary": "kde.org - High CPU usage when scrolling through the videos on the page",
        "status": "NEW"
      },
      {
        "summary": "shellshock.io - Mouse input sensitivity shows performance issues (page states to use Chrome for a better experience)",
        "status": "NEW",
        "id": 2019926
      },
      {
        "id": 2021898,
        "summary": "Resizing the vertical tabs sidebar is extremely slow and laggy",
        "status": "UNCONFIRMED"
      }
    ]
  },
  "triageMemory": {
    "bugs": [
      {
        "summary": "randomly massive memory usage with browser freeze",
        "status": "UNCONFIRMED",
        "id": 1893881
      },
      {
        "id": 1894286,
        "status": "UNCONFIRMED",
        "summary": "Multiple gigabytes of tiny detached windows"
      },
      {
        "id": 1896500,
        "summary": "Memory Leak on newest version. 14 task manager occurrences from one tab open using over a gig of memory. Laptop is overheating and only fix is reset computer.",
        "status": "UNCONFIRMED"
      },
      {
        "status": "UNCONFIRMED",
        "summary": "ASan Nightly memory leak on certain webpages",
        "id": 1900881
      },
      {
        "id": 1907716,
        "summary": "Firefox used up most of my system RAM",
        "status": "UNCONFIRMED"
      },
      {
        "status": "UNCONFIRMED",
        "summary": "Very high memory usage, Leaks all system RAM and quits",
        "id": 1913582
      },
      {
        "summary": "Ever increasing ram usage on mac",
        "status": "UNCONFIRMED",
        "id": 1916021
      },
      {
        "id": 1921757,
        "summary": "Firefox is using too much memory - 4GB. 4 Add-ons",
        "status": "UNCONFIRMED"
      },
      {
        "status": "NEW",
        "summary": "High shared memory usage on lagosjumpradio.com",
        "id": 1922234
      },
      {
        "id": 1924220,
        "summary": "Apple Silicon Firefox Memory Leak",
        "status": "UNCONFIRMED"
      },
      {
        "id": 1925226,
        "summary": "High memory usage",
        "status": "UNCONFIRMED"
      },
      {
        "id": 1925736,
        "summary": "12GB+ memory leak in an extension. About:memory shows tons of similar data:image /png base64 URIs  (Was: Memory leak in Ubuntu 24.04 // Firefox 131.0.2)",
        "status": "UNCONFIRMED"
      },
      {
        "summary": "Firefox working-set size increases over time -- Fail to release pages?",
        "status": "UNCONFIRMED",
        "id": 1931602
      },
      {
        "summary": "Firefox uses ~8GB (or more) to load https://www.w3schools.com/html/html_favicon.asp, Chrome tops out at 2GB",
        "status": "NEW",
        "id": 1931634
      },
      {
        "summary": "Firefox 133 and 134 betas repeatedly use excessive memory and hang when releasing",
        "status": "NEW",
        "id": 1931914
      },
      {
        "status": "UNCONFIRMED",
        "summary": "Memory leaks with WebExtensions",
        "id": 1932080
      },
      {
        "summary": "Memory Leak When Rendering Large Data Tables in Firefox",
        "status": "UNCONFIRMED",
        "id": 1934426
      },
      {
        "summary": "there might be a memory leak, excessive ram usage impacting functions",
        "status": "UNCONFIRMED",
        "id": 1935516
      },
      {
        "summary": "Memory leak caused by minimizing or obscuring the browser with a fullscreen window",
        "status": "UNCONFIRMED",
        "id": 1935525
      },
      {
        "status": "UNCONFIRMED",
        "summary": "memory usage too high, up to 2gb of ram",
        "id": 1937327
      },
      {
        "summary": "Firefox nightly 135.0a1 for macos high ram usage",
        "status": "UNCONFIRMED",
        "id": 1937651
      },
      {
        "id": 1939051,
        "summary": "Runaway memory leak every 24 hours",
        "status": "UNCONFIRMED"
      },
      {
        "status": "UNCONFIRMED",
        "summary": "Firefox using 2+ GB of memory even with less than 6 tabs open",
        "id": 1939357
      },
      {
        "id": 1939424,
        "status": "UNCONFIRMED",
        "summary": "RAM usage"
      },
      {
        "summary": "Despite having all of opened tabs being discarded, amount of memory firefox uses is still very high.",
        "status": "UNCONFIRMED",
        "id": 1939960
      },
      {
        "summary": "Memory leak",
        "status": "UNCONFIRMED",
        "id": 1941208
      },
      {
        "id": 1942536,
        "summary": "High RAM Usage",
        "status": "UNCONFIRMED"
      },
      {
        "id": 1945363,
        "summary": "Very high memory usage (4GB) on YouTube",
        "status": "UNCONFIRMED"
      },
      {
        "summary": "Firefox causes memory leaks",
        "status": "UNCONFIRMED",
        "id": 1945742
      },
      {
        "id": 1946907,
        "summary": "memory issue",
        "status": "UNCONFIRMED"
      },
      {
        "status": "UNCONFIRMED",
        "summary": "Weird memory usage for Pre-loaded New Tab In MacOS",
        "id": 1947295
      },
      {
        "summary": "Firefox is using a lot of RAM on youtube",
        "status": "UNCONFIRMED",
        "id": 1948501
      },
      {
        "status": "UNCONFIRMED",
        "summary": "Firefox uses too much ram",
        "id": 1949721
      },
      {
        "id": 1951532,
        "summary": "memory youtube",
        "status": "UNCONFIRMED"
      },
      {
        "id": 1952233,
        "status": "UNCONFIRMED",
        "summary": "Very high and unusual memory usage from Firefox"
      },
      {
        "id": 1952640,
        "status": "UNCONFIRMED",
        "summary": "Mozilla Consumes Lots of memory Recently after updating to new version I believe"
      },
      {
        "summary": "high memory usuage",
        "status": "UNCONFIRMED",
        "id": 1952654
      },
      {
        "status": "UNCONFIRMED",
        "summary": "Why does Firefox consume alot of memory when posting multipart/form-data request with total size greater that ~5GB?",
        "id": 1953185
      },
      {
        "id": 1955032,
        "status": "UNCONFIRMED",
        "summary": "discovered memory leak w/ firefox for windows after reloading tabs - tried w/ tab reload and powershell - all ram gets consumed"
      },
      {
        "status": "UNCONFIRMED",
        "summary": "Excess memory usage",
        "id": 1955512
      },
      {
        "id": 1955563,
        "summary": "Firefox is using too much RAM",
        "status": "UNCONFIRMED"
      },
      {
        "id": 1956680,
        "summary": "Big memory leak when browsing aliexpress",
        "status": "UNCONFIRMED"
      },
      {
        "id": 1957209,
        "summary": "Rapid memory growth on https://observablehq.com/d/a741f9a27e8c0e73. And almost all of it is heap-unclassified (d3.js)",
        "status": "NEW"
      },
      {
        "id": 1959569,
        "status": "UNCONFIRMED",
        "summary": "Firefox uses 1.5 GB of RAM with only two tabs open in Windows 11, and causes frequent crashes."
      },
      {
        "id": 1961415,
        "summary": "Firefox memory leak when watching YouTube Shorts",
        "status": "UNCONFIRMED"
      },
      {
        "summary": "there are memory problems when other apps try to use firefox such as plugins, or sometimes it just randomly removes memory. i got signed out of everything.",
        "status": "UNCONFIRMED",
        "id": 1961707
      },
      {
        "status": "UNCONFIRMED",
        "summary": "high cpu memory youtube",
        "id": 1964744
      },
      {
        "summary": "firefox taking too much memory",
        "status": "UNCONFIRMED",
        "id": 1967143
      },
      {
        "summary": "Firefox stuck on garbage collection infinitely when using youtube",
        "status": "UNCONFIRMED",
        "id": 1968166
      },
      {
        "id": 1968605,
        "summary": "FirefoxCP Isolated web content eats ram Macbook air m4 and m1",
        "status": "UNCONFIRMED"
      },
      {
        "id": 1969774,
        "status": "UNCONFIRMED",
        "summary": "Firefox consume a lot of RAM after latest update"
      },
      {
        "id": 1972891,
        "status": "UNCONFIRMED",
        "summary": "Extremely high memory usage (16GB) after leaving tab open for multiple hours"
      },
      {
        "id": 1974559,
        "status": "NEW",
        "summary": "Modified codepen demo takes 4GB RAM with all of it in heap-unclassified. It is also ~2x slower in firefox."
      },
      {
        "id": 1976603,
        "summary": "Unusual memory usage while minimized.",
        "status": "UNCONFIRMED"
      },
      {
        "status": "NEW",
        "summary": "Codepen demo (https://codepen.io/shubniggurath/pen/MYwdaEq) can spend 15 seconds around cleanup on dragging some control sliders",
        "id": 1977091
      },
      {
        "summary": "High RAM memory usage in Firefox 141 (or memory leak)",
        "status": "UNCONFIRMED",
        "id": 1979506
      },
      {
        "id": 1980023,
        "summary": "Memory leak in main process over extended (2+ days) sessions",
        "status": "UNCONFIRMED"
      },
      {
        "id": 1982423,
        "status": "NEW",
        "summary": "Incorporate Linux memory PSI on tab unloading"
      },
      {
        "summary": "Huge memory leak.  Almost unusable with hangs gyrations in search/tab",
        "status": "UNCONFIRMED",
        "id": 1983342
      },
      {
        "id": 1985723,
        "status": "NEW",
        "summary": "Scrolling web page very high CPU usage and blank sections (Decode of multiple large images on multiple TC threads, rapid rise in shared memory leading to hang/OOM)"
      },
      {
        "id": 1987212,
        "summary": "memory leak when scrolling code blocks on chatgpt.com",
        "status": "UNCONFIRMED"
      },
      {
        "id": 1989728,
        "status": "UNCONFIRMED",
        "summary": "Firefox unloading pages from memory when heaps of memory available"
      },
      {
        "id": 1989835,
        "status": "UNCONFIRMED",
        "summary": "Firefox freezing Linux Kernel by propagating Memory Leak on Website"
      },
      {
        "id": 1990191,
        "status": "UNCONFIRMED",
        "summary": "memory leak on macos"
      },
      {
        "status": "NEW",
        "summary": "High RAM memory usage in Firefox 141 using specifc AddOns - relation to 1979506",
        "id": 1990814
      },
      {
        "summary": "big memory usage on mac",
        "status": "UNCONFIRMED",
        "id": 1991006
      },
      {
        "id": 1996795,
        "summary": "Memory leak in main Firefox proces",
        "status": "UNCONFIRMED"
      },
      {
        "status": "UNCONFIRMED",
        "summary": "Memory Leak in Firefox 144.0.2",
        "id": 1998695
      },
      {
        "id": 1998777,
        "summary": "Large Heap followed by Streams use causing crash",
        "status": "NEW"
      },
      {
        "status": "UNCONFIRMED",
        "summary": "High memory usage of FF 144.0.2",
        "id": 1999129
      },
      {
        "id": 2000414,
        "status": "ASSIGNED",
        "summary": "Opening a huge dropdown menu permanently increases the RAM use of parent-process. It also makes opening/closing/dragging tabs permanently slow."
      },
      {
        "id": 2001788,
        "status": "UNCONFIRMED",
        "summary": "macOS Memory Crash"
      },
      {
        "id": 2004182,
        "status": "UNCONFIRMED",
        "summary": "High RAM usage after a day of work"
      },
      {
        "summary": "Constantly growing `heap-unclassified` and memory usage on Debian Sid",
        "status": "UNCONFIRMED",
        "id": 2004564
      },
      {
        "summary": "TrueNAS 25.10.x memory leak when dashboard is visible",
        "status": "UNCONFIRMED",
        "id": 2004895
      },
      {
        "id": 2005342,
        "status": "UNCONFIRMED",
        "summary": "Regular massive memory leak"
      },
      {
        "id": 2006438,
        "status": "UNCONFIRMED",
        "summary": "High GPU/Memory Usage In All Scenarios (Possible Memory Leak)"
      },
      {
        "status": "UNCONFIRMED",
        "summary": "Firefox started using 2.5 to 3 GB of RAM. I have the same number of tabs open as usual--maybe only a few more.",
        "id": 2006766
      },
      {
        "id": 2007243,
        "summary": "Not localized memory types in Devtools",
        "status": "UNCONFIRMED"
      },
      {
        "id": 2007324,
        "summary": "hianime.pe - Memory fluctuations when watching videos",
        "status": "NEW"
      },
      {
        "id": 2007363,
        "summary": "Firefox  146 on Mac OS Tahoe 26.2, massive memory leak",
        "status": "UNCONFIRMED"
      },
      {
        "status": "UNCONFIRMED",
        "summary": "DoS by memory exhaustion that continues to run after closing tab",
        "id": 2007800
      },
      {
        "status": "UNCONFIRMED",
        "summary": "Firefox uses FAR too much memory",
        "id": 2010087
      },
      {
        "status": "UNCONFIRMED",
        "summary": "Memory 17GB+",
        "id": 2010683
      },
      {
        "id": 2011061,
        "status": "UNCONFIRMED",
        "summary": "Firefox process not freeeing memory properly"
      },
      {
        "summary": "Firefox routinely does not respond due to memory leak",
        "status": "UNCONFIRMED",
        "id": 2011479
      },
      {
        "id": 2012127,
        "summary": "High VRAM/RAM usage when using Google Streetview",
        "status": "UNCONFIRMED"
      },
      {
        "status": "UNCONFIRMED",
        "summary": "firefox memory leak when minimised",
        "id": 2013937
      },
      {
        "summary": "Firefox uses excessive memory and freezes entire laptop",
        "status": "UNCONFIRMED",
        "id": 2014947
      },
      {
        "status": "UNCONFIRMED",
        "summary": "Clear Data dialog cache size not updated after clearing RAM cache",
        "id": 2014966
      },
      {
        "summary": "Firefox using too much memory",
        "status": "UNCONFIRMED",
        "id": 2015988
      },
      {
        "id": 2016894,
        "summary": "Memory leak when repeatedly calling window.open() - internal window tracking prevents GC",
        "status": "UNCONFIRMED"
      },
      {
        "status": "UNCONFIRMED",
        "summary": "Resource draining issue",
        "id": 2018047
      },
      {
        "id": 2018485,
        "status": "UNCONFIRMED",
        "summary": "Quitting Firefox results in a memory spike.  If already OOM due to memory leaks --- results in severe thrashing.  Repeatable.  Takes minutes to hours to resolve.  Win 10/11.  Long standing over various updates."
      },
      {
        "id": 2019929,
        "summary": "www.investing.com - Application crashes due to memory leak (ESR)",
        "status": "NEW"
      }
    ]
  },
  "triageNavigation": {
    "bugs": []
  },
  "triageResponsiveness": {
    "bugs": [
      {
        "status": "NEW",
        "summary": "Lagging and hanging very slow, unresponsive for seconds up to 10s of seconds - long CC on LookerStudio",
        "id": 1980116
      },
      {
        "status": "NEW",
        "id": 1981051,
        "summary": "Firefox hangs on MacOS for seconds, getting worse over time"
      },
      {
        "summary": "Lag spike after same page navigation (history.pushState)",
        "id": 1983354,
        "status": "UNCONFIRMED"
      },
      {
        "status": "UNCONFIRMED",
        "id": 1988359,
        "summary": "Firefox hangs on opening new webpages"
      },
      {
        "id": 2000776,
        "summary": "Compare with Edge for Android, scrolling on https://mijia.wiki/products/midr.cateye.db400a on Fenix is laggy",
        "status": "UNCONFIRMED"
      },
      {
        "summary": "Firefox Freezes",
        "id": 2001884,
        "status": "UNCONFIRMED"
      },
      {
        "id": 2002560,
        "summary": "www.douyin.com - Jankiness when scrolling through videos",
        "status": "NEW"
      }
    ]
  },
  "triageStartup": {
    "bugs": [
      {
        "id": 1968975,
        "status": "UNCONFIRMED",
        "summary": "[Windows 10/11] Firefox on the store takes a good few minutes to autostart"
      }
    ]
  }
}