Firefox Devtools MCP for Codex
Model Context Protocol server for Firefox DevTools - enables AI assistants to inspect and control Firefox browser through WebDriver BiDi
How to install Firefox Devtools MCP in Codex
Add it to Codex as an MCP server:
codex mcp add firefox-devtools -- npx @mozilla/firefox-devtools-mcp@latestCommand copied from the repo README (Codex's `codex mcp add` adds an MCP server to Codex). Check the README for any API key or setup it needs. Source: repo README.
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What it contains
Component list not published in a manifest we can read. See the repo README.
About this listing
Firefox Devtools MCP is a community connector on GitHub by mozilla. Its README documents a Codex install and the repo documents a codex mcp add command. It passed the CodexStacks quality filter for repos found this way (at least 100 stars, pushed in the last 90 days, not a fork or a list). OpenAI hasn't reviewed it, but it passed our Codex install check on Oct 29, 2026 (an install and load check, not a code review). It's one of 441 listings in the Developer Tools category (category assigned by CodexStacks from the repo's topics and description).
Firefox Devtools MCP FAQ
How do I install Firefox Devtools MCP in Codex?
Add it as an MCP server with codex mcp add firefox-devtools -- npx @mozilla/firefox-devtools-mcp@latest (copied from the repo README; check it for any API key or setup the server needs).
Is Firefox Devtools MCP an official Codex connector?
No. Firefox Devtools MCP is a community repo on GitHub by mozilla. It passed the CodexStacks quality filter, but OpenAI hasn't reviewed it, but it passed our Codex install check on Oct 29, 2026 (an install and load check, not a code review), so read the code before you install it.
What does Firefox Devtools MCP include?
Component list not published in a manifest we can read. See the repo README.
Details
- Type
- Connector
- Category
- Developer Tools (assigned by us)
- Source
- Community
- Author
- mozilla
- GitHub stars
- 529 (at last sync)
- Last push
- 2026-10-28
- GitHub topics
- claude-code, firefox, mcp, mcp-server
- Source
- https://github.com/mozilla/firefox-devtools-mcp
- Listed via
- GitHub search: README documents a Codex install
- Install check by CodexStacks
- Passed on Oct 29, 2026 with Codex CLI 0.163.0: Codex started its MCP server and listed its tools. proof · how we check
Something wrong or missing? Submit or improve this listing. Listings also refresh automatically every night.
For maintainers: badge and embeds
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Markdown
[](https://codexstacks.com/p/firefox-devtools-mcp/)HTML
<a href="https://codexstacks.com/p/firefox-devtools-mcp/"><img src="https://codexstacks.com/badge.svg" alt="Listed on CodexStacks" width="172" height="28"></a>Embed card (static HTML and inline CSS, no JavaScript). Preview:
<a href="https://codexstacks.com/p/firefox-devtools-mcp/" style="display:block;max-width:380px;box-sizing:border-box;padding:14px 16px;border:1px solid #3a2c26;border-radius:12px;background:#0d0b0a;color:#f3ece6;font:14px/1.45 -apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;text-decoration:none"><span style="display:block;font-size:16px;font-weight:700;color:#f3ece6">Firefox Devtools MCP</span><span style="display:block;margin:2px 0 8px;font-size:12px;color:#b5a9a1">Community Codex connector</span><span style="display:block;margin:0 0 10px;color:#ddd3cc">Model Context Protocol server for Firefox DevTools - enables AI assistants to inspect and control Firefox browser…</span><span style="font-size:12px;font-weight:600;color:#ffb347">View on CodexStacks →</span></a>Markdown summary
**[Firefox Devtools MCP on CodexStacks](https://codexstacks.com/p/firefox-devtools-mcp/)**: Community Codex connector.More on badges, embeds and keeping your listing up to date: CodexStacks for plugin authors.
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