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mozilla/firefox-devtools-mcp

Control and debug Firefox: navigate, fill forms, inspect network and console, profile.

TypeScript
★ 564 stars Last pushed 2026-11-04 License: NOASSERTION
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Review any command before running it. Package names and URLs come from the server's own registry entry.

Package (npm 0.10.7)

npx -y @mozilla/[email protected]

Or add to your MCP client config:

{
  "mcpServers": {
    "firefox-devtools-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@mozilla/[email protected]"
      ]
    }
  }
}
  • FIREFOX_HEADLESS — Set to true to run Firefox without a visible window.
  • START_URL — URL to open when the server starts.

This server takes extra arguments — see its repository.

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