Gosub is a browser engine written from scratch in Rust. It has its own HTML5 and CSS3 parsers, an async networking stack, a zone/tab model that isolates cookies and storage per zone, and a choice of render backends (Cairo, Skia, Vello/wgpu). The engine is meant to be embedded: you provide the UI and a render surface, the engine handles the rest.
Don't expect a daily driver yet. There is no JavaScript and no form input, but it does render real pages. Below is Beacon, our GTK4 browser built on the engine:
The active repositories:
| Repository | What it is |
|---|---|
| gosub-engine | The browser engine itself. Start here |
| gosub-beacon | Beacon, a GTK4 browser built on the engine |
| gosub-sonar | Async HTTP networking stack |
| gosub-baleen | Experimental adblock / request filter engine |
| gosub.io | The gosub.io website |
| tests.gosub.io | Test pages for browser testing |
| web-weekly | Weekly renders of popular sites to track engine progress |
| css-typegen | Generates Rust types for CSS properties |
The other repositories are proofs of concept and archived experiments.
We love contributions from everybody. Read the contribution page to find out more, or come ask around in the chat.
| Link | Description |
|---|---|
| https://gosub.io | Main website |
| https://chat.developer.gosub.io | Zulip developer chat |
| https://chat.gosub.io | General user chat (Discord) |
| https://wiki.developer.gosub.io | Project wiki |
