Browsers / CONNECTION GUIDE

Firefox MCP Server for Claude Code, Codex & Cursor

Mozilla’s Marionette remote protocol exposes Firefox browser automation.

Integration documentation

Firefox integrations and connections

API · Live app

Firefox Marionette

Mozilla’s Marionette remote protocol exposes Firefox browser automation.

Platforms: Windows, macOS, Linux

Automate browser navigation and interaction

Claude Code · Not documented

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

Codex · Not documented

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

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.

View setup Maintainer documentation

MCP · Live app

Playwright MCP

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

Platforms: Windows, macOS, Linux

Claude Code · Documented

The maintainer documents Claude Code setup for this connection.

Codex · Documented

The maintainer documents Codex setup for this connection.

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.

View setup Maintainer documentation

Compare connections

Compare how each route works, what it can do, and what you need to run it.

Connection	Workflow and platform	Capabilities	Documented agents	Requirements and limitations
Firefox Marionette API	Live app Windows, macOS, Linux	Automate browser navigation and interaction	See compatibility	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.
Playwright MCP MCP	Live app Windows, macOS, Linux	Navigate pages and interact with forms Capture browser screenshots	Claude Code, Codex, Cursor	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.

Firefox Marionette

How it works
API · Live app
Windows, macOS, Linux

Capabilities
Automate browser navigation and interaction

Documented agents
See compatibility

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.

Playwright MCP

How it works
MCP · Live app
Windows, macOS, Linux

Capabilities
Navigate pages and interact with forms · Capture browser screenshots

Documented agents
Claude Code · Codex · Cursor

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.

Choose an AI agent

Claude Code + Firefox Codex + Firefox Cursor + Firefox

Questions before setup

Does one integration cover every workflow?

No such claim is made. Check the capability list, requirements and limitations of each route, then test a copy of a representative project.