mozilla/firefox-devtools-mcp

Item: mozilla/firefox-devtools-mcp
Rating: 74
Author: M8ven

Model Context Protocol (MCP) server for Firefox DevTools automation

→ mozilla/firefox-devtools-mcp· npm: @mozilla/firefox-devtools-mcp· listed on npm

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// key findings

✅

No credential exfiltration, no sensitive file access, no obfuscation

Static analysis found nothing flowing your secrets to unexpected places.

✅

Open source with a license and README

Anyone can audit the code, the license is declared, and the publisher documents what it does.

// 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

configAUTO_PROFILE

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

configENABLE_PRIVILEGED_CONTEXT— enable-privileged-context — _deprecated, use --tool-preset mozilla or --tools ... privileged prefs._ Selects the mozilla tool preset. Requires MOZ_REMOTE_ALLOW_SYSTEM_ACCESS=1 (=true)

configENABLE_SCRIPT— enable-script — _deprecated, use --tool-preset developer or --tools ... script debugging._ Selects the developer tool preset. (=true)

configFIREFOX_HEADLESS— headless — run without UI (=true)

configFIREFOX_PATH

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

configMOZ_DISABLE_UPDATE_PROCESSING

configNVM_DIR

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

configTEST_ONLINE

configTOOL_PRESET— tool-preset — select which tool modules to enable: slim, basic (default), developer, mozilla, or all. See [Tool modules and presets](#tool-modules-and-presets). ()

configUNRESTRICTED_SAVE_PATHS

// 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 0 concrete improvements 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-w3nqiu)](https://m8ven.ai/mcp/mozilla-firefox-devtools-mcp-w3nqiu)

commit: 3bf7633dc542563f34ef4129cfb9e3de7a432728

code hash: 37e7dd1d227a28e3c810c0de74d19df7975dff0be59c9a7a72be8eee3a20a3a6

verified: 7/29/2026, 9:25:16 AM

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