AppStrings.How it works
APPLICATION × AGENT

Cursor Firefox integration

Mozilla’s Marionette remote protocol exposes Firefox browser automation. For Cursor, 1 route is explicitly documented by the integration maintainer.

Connection options for Cursor

API · Live app

Firefox Marionette

Mozilla’s Marionette remote protocol exposes Firefox browser automation.

Platforms: Windows, macOS, Linux

Cursor · Not documented

The native interface is documented, but no setup for this coding agent is established by this source.

Requirements and limitations

Firefox with Marionette enabled and a compatible automation client or driver.

Requires an explicit remote automation configuration and client; no named-agent setup is established by this source.

MCP · Live app

Playwright MCP

Microsoft’s Playwright MCP server automates supported browsers with structured page interaction tools.

Platforms: Windows, macOS, Linux

Cursor · Documented

The maintainer documents Cursor setup for this connection.

Requirements and limitations

Node.js and a supported browser or Playwright-managed browser installation; existing Chrome/Edge sessions need the extension route.

Attaching an existing browser through the extension supports Chrome and Edge. Firefox uses the managed-browser route.

Compare the actual routes

IntegrationCursor compatibilityRequirements
Firefox MarionetteNot documented Firefox with Marionette enabled and a compatible automation client or driver.
Playwright MCPDocumented setup Setup guide Node.js and a supported browser or Playwright-managed browser installation; existing Chrome/Edge sessions need the extension route.

Can Cursor control all of Firefox?

The sources establish the capabilities listed above, not complete application coverage. Check each bridge’s limitations and your application version before starting.

Which setup should I use?

Choose a route that explicitly documents Cursor and matches your environment. Start with the maintainer’s setup guide and a disposable project copy. Shared MCP support alone is listed as an inference.

All Firefox integrations