firefox-devtools-mcp

Model Context Protocol server for Firefox DevTools - enables AI assistants to inspect and control Firefox browser through the Remote Debugging Protocol

→ mozilla/firefox-devtools-mcp · listed on github_topic

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// key findings

🚨

Known vulnerabilities in dependencies: 1 critical

Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.

// required environment variables

This server reads these from process.env. You'll be asked to provide them before it can run.

configACCEPT_INSECURE_CERTS— accept-insecure-certs — ignore TLS errors (=true)

configANDROID_PACKAGE

configCONNECT_EXISTING— connect-existing — attach to an already-running Firefox instead of launching a new one (=true)

configENABLE_PRIVILEGED_CONTEXT

configENABLE_SCRIPT— enable-script — enable the evaluate_script tool, which executes arbitrary JavaScript in the page context (=true)

configFIREFOX_HEADLESS— headless — run without UI (=true)

configFIREFOX_PATH

configMARIONETTE_PORT— marionette-port — Marionette port for connect-existing mode, default 2828 ()

configMOZ_REMOTE_ALLOW_SYSTEM_ACCESS— Privileged Context: list/select privileged ("chrome") contexts, evaluate_privileged_script (requires =1)

configNVM_DIR

configSTART_URL— env =https://example.com \

configTEST_ONLINE

// full audit trail

The full breakdown of what we checked, the deductions that landed, the network hosts, the dependency advisories, and concrete fix guidance is available to verified publishers.

// improvement guidance — verified publishers only

We have 1 concrete improvement we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.

// embed badge in your README

[![M8ven Score](https://m8ven.ai/badge/mcp/mozilla-firefox-devtools-mcp-cgkoud)](https://m8ven.ai/mcp/mozilla-firefox-devtools-mcp-cgkoud)

commit: 4c55ffc10f4420fbac7e9c736c7068af3e6bcf38

code hash: 4c71a9ccfa488284ead436eed2afb00166c898ea96374bdf3794c397a1a991cb

verified: 6/4/2026, 11:37:22 AM

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