invisible_playwright_mcp Pairs MCP With Stealth Firefox

The invisible_playwright_mcp project packages a browser agent as an MCP server and a local web UI, claiming the underlying Firefox engine is undetectable by anti-bot systems and CAPTCHAs. For developers, this allows assistant clients to drive page interactions with configuration options retaining login state, routing traffic through a proxy, and sending page content to external providers.

Two interfaces to the same browser are provided, with a standalone interface running locally and an MCP server invoked without subcommands.

Configuration includes proxies, browser identities, persistent profile directories, and headed mode. The agent interacts through pointer movements and key presses, retaining cookies and logins across restarts. Each launch downloads the Firefox engine and a GeoIP database from GitHub releases, while an MCP client sends browser traffic to OpenRouter. While configuration details and data flows are documented, the anti-detection claim lacks a target-site matrix, testing protocol, success rate, or independent validation.

However, the repository warns that changing the interface host exposes an unauthenticated service and passing an OpenRouter key on the command line places it in shell history or process list. The project cautions users to respect rate limits, avoid submitting anything not reviewed by a human, and read site terms of service. The unresolved control boundary lies in whether developers can gain browser access without granting broad access to stored sessions or sensitive content.