manifest.json

{
  "manifest_version": 3,
  "name": "Show in Mail URL for macOS Calendar",
  "version": "1.2",
  "description": "Provides the 'Show in Mail' URL to be added in an iOS/macOS Calendar event referering to the message ID. Can also be customized for gmail URLs using the custom URL format in the extension preferences.",
  "author": "z-aki",
  "message_display_action": {
    "default_popup": "popup.html",
    "default_title": "Message ID URL",
    "default_label": "link",
    "default_icon": {
      "128": "icon128.png"
    }
  },
  "icons": {
      "128": "icon128.png"
  },
  "permissions": [
    "messagesRead",
    "clipboardWrite",
    "menus",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "message_id_url@z-aki",
      "strict_min_version": "128.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "options_ui": {
    "page": "settings.html"
  }
}