74
/ 100
1 month ago
glama
Firefox DevTools MCP
Automates Firefox via WebDriver BiDi for browser control, including navigation, screenshot, network capture, and script execution, using natural language through MCP clients.
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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.
// known CVEs in dependencies1 critical1 low
Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
When Vitest UI server is listening, arbitrary file can be read and executed
ws: Uninitialized memory disclosure
Depend on this server? Get alerted when its CVEs change.Watch this server free →
// required environment variables
This server reads these from
process.env. You'll be asked to provide them before it can run.config
ACCEPT_INSECURE_CERTS— accept-insecure-certs — ignore TLS errors (=true)config
ANDROID_PACKAGEconfig
CONNECT_EXISTING— connect-existing — attach to an already-running Firefox instead of launching a new one (=true)config
ENABLE_PRIVILEGED_CONTEXTconfig
ENABLE_SCRIPT— enable-script — enable the evaluate_script tool, which executes arbitrary JavaScript in the page context (=true)config
FIREFOX_HEADLESS— headless — run without UI (=true)config
FIREFOX_PATHconfig
MARIONETTE_PORT— marionette-port — Marionette port for connect-existing mode, default 2828 ()config
MOZ_REMOTE_ALLOW_SYSTEM_ACCESS— Privileged Context: list/select privileged ("chrome") contexts, evaluate_privileged_script (requires =1)config
NVM_DIRconfig
START_URL— env =https://example.com \config
TEST_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
[](https://m8ven.ai/mcp/mozilla-firefox-devtools-mcp-74ud10)commit: b0f4495336b36b875cee29480150e660088c3e1a
code hash: f357b447e0e65229e95c9e1224807548529129bde768f7fe7c75523f3a73bfab
verified: 6/12/2026, 10:35:22 AM