Firefox Devtools MCP Moz

Name: Firefox Devtools MCP Moz
Author: GitHub Actions

@mozilla/firefox-devtools-mcp-moz · by GitHub Actions

Model Context Protocol (MCP) server for Firefox DevTools automation (moz build with privileged context support)

371 12 tools GitHub npm

No known CVEs

No license

Actively maintained

Last commit 1d ago

Works with most clients

Transport: stdio, http

12 tools · ~496 tok

Grade A · 0.2% of 200K ctx

MCPpedia last refreshed this data 9h ago

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Firefox Devtools MCP Moz is an MCP server that model Context Protocol (MCP) server for Firefox DevTools automation (moz build with privileged context support). Its tool list has not been published yet over stdio and http, requires no API key, and scores 88/100 on MCPpedia's security, maintenance and efficiency rubric.

AI / ML

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "firefox-devtools": {
      "env": {
        "START_URL": "about:blank"
      },
      "args": [
        "-y",
        "@mozilla/firefox-devtools-mcp@latest",
        "--headless",
        "--viewport",
        "1280x720"
      ],
      "command": "npx"
    }
  }
}

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[![MCPpedia Score](https://mcppedia.org/api/badge/firefox-devtools-mcp-moz)](https://mcppedia.org/s/firefox-devtools-mcp-moz)

Read me

What Firefox Devtools Mcp Moz does

Model Context Protocol server for automating Firefox via WebDriver BiDi (through Selenium WebDriver). Works with Claude Code, Claude Desktop, Cursor, Cline and other MCP clients.

Test This Server

Run this in your terminal to verify the server starts. Then let us know if it worked — your result helps other developers.

npx -y '@mozilla/firefox-devtools-mcp-moz' 2>&1 | head -1 && echo "✓ Server started successfully"

After testing, let us know if it worked:

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

88/100across 5 weighted dimensions

How we score →

0255075100

−12

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked @mozilla/firefox-devtools-mcp-moz against OSV.dev.

Inventory

Tools (12)

Click any tool to inspect its schema.

~496 tokens total

Community

Reviews

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Have you used this server?

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How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is Firefox Devtools Mcp Moz safe to use?: Firefox Devtools Mcp Moz has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.
How do I install Firefox Devtools Mcp Moz?: Firefox Devtools Mcp Moz supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can Firefox Devtools Mcp Moz do?: Firefox Devtools Mcp Moz provides 12 tools: Note, navigate_page, get_network_request, console, debugging and 7 more. See the full tools list on the server page for descriptions and parameters.
What AI clients work with Firefox Devtools Mcp Moz?: Firefox Devtools Mcp Moz is compatible with claude-desktop, cursor, claude-code. It uses stdio and http transport.
Is Firefox Devtools Mcp Moz actively maintained?: Firefox Devtools Mcp Moz is actively maintained — last commit was 1 day ago. It has 371 GitHub stars.

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MCP Security Weekly

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Community

Discussion

Start a conversation

Ask a question, share a tip, or report an issue.

Has anyone used this with Cursor?How do you handle auth?Any alternatives?

{ "mcpServers": { "firefox-devtools": { "env": { "START_URL": "about:blank" }, "args": [ "-y", "@mozilla/firefox-devtools-mcp@latest", "--headless", "--viewport", "1280x720" ], "command": "npx" } } }

Frequently Asked Questions

Is Firefox Devtools Mcp Moz safe to use?

Firefox Devtools Mcp Moz has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.

How do I install Firefox Devtools Mcp Moz?

Firefox Devtools Mcp Moz supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.

What can Firefox Devtools Mcp Moz do?

Firefox Devtools Mcp Moz provides 12 tools: Note, navigate_page, get_network_request, console, debugging and 7 more. See the full tools list on the server page for descriptions and parameters.

What AI clients work with Firefox Devtools Mcp Moz?

Firefox Devtools Mcp Moz is compatible with claude-desktop, cursor, claude-code. It uses stdio and http transport.

Is Firefox Devtools Mcp Moz actively maintained?

Firefox Devtools Mcp Moz is actively maintained — last commit was 1 day ago. It has 371 GitHub stars.