Foxbridge is an open-source protocol translator that exposes a Chrome DevTools Protocol surface on top of Firefox's Juggler and WebDriver BiDi. Drive Vulpine browser or vanilla Firefox with Playwright, Puppeteer, or anything else that speaks CDP.
A Go daemon that listens on :9222with the Chrome DevTools Protocol surface most automation tools expect, then translates calls into Firefox's Juggler protocol or WebDriver BiDi. Your existing Playwright / Puppeteer code path doesn't change; the browser underneath becomes Firefox.
Vulpine browser handles Firefox-side fingerprint coherence; CDP-native agent stacks have years of battle-testing. Foxbridge is the seam that lets you keep the agent stack and swap the browser. It is bundled with VulpineOS and used by the orchestrator transparently — but it is standalone and works without VulpineOS too.
Same wire-format your tools already speak. No client changes.
Firefox-native automation surface. Not a Chrome compatibility shim.
VulpineOS embeds Foxbridge directly. You can also run it as a standalone daemon.
If the Vulpine browser binary is missing, CDP clients can still use their own browser, but they lose the VulpineOS browser-layer primitives.
github.com/VulpineOS/Foxbridge — issues, discussions, releases.
docs.vulpineos.com/foxbridge — install + configure.
All four open-source pieces — VulpineOS, Foxbridge, vulpine-mark, mobilebridge — are MPL 2.0 and ship together.
