FF Browser MCP Bridge by nullthrix
Connects a browser tab to a local MCP server so an AI agent can drive your real, logged-in browser.
Extension Metadata
About this extension
Connects your real, logged-in Firefox to an AI agent — no separate browser profile, no cloud relay, everything stays on your machine.
Unlike headless automation tools, this extension uses your existing Firefox session. Your cookies, logins, and saved credentials work as-is. All automation runs locally — nothing is sent to remote servers.
Requires the companion MCP server (free, open source):
Add that to your MCP client config (Claude, Cursor, Windsurf, Bob), then click the toolbar icon in the tab you want to control. The badge turns ON when connected.
Source: https://github.com/nullthrix/firefox-mcp-server
Unlike headless automation tools, this extension uses your existing Firefox session. Your cookies, logins, and saved credentials work as-is. All automation runs locally — nothing is sent to remote servers.
Requires the companion MCP server (free, open source):
npx ff-browser-mcp-bridge@latest
Add that to your MCP client config (Claude, Cursor, Windsurf, Bob), then click the toolbar icon in the tab you want to control. The badge turns ON when connected.
Source: https://github.com/nullthrix/firefox-mcp-server
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Permissions and data
Required permissions:
- Access browser tabs
- Access your data for all websites
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Add-on Links
- Version
- 0.1.0
- Size
- 50.56 KB
- Last updated
- 19 days ago (Oct 11, 2026)
- Related Categories
- License
- Apache License 2.0
- Version History
- Add to collection