AI Plugin Index
Firefox DevTools MCP
CommunityMCP server by mozilla · updated · ★ 503 · 5.3k downloads a week
Control and debug Firefox: navigate, fill forms, inspect network and console, profile. Firefox DevTools MCP is a community project by mozilla, not verified by a company domain.
Last commit 4 days ago
No licence found, so reuse rights are unclear
Clear description, published package or server URL, 503 stars, original repository
Not checked yet. What we check
Install Firefox DevTools MCP
Built from the published package, never by AIclaude mcp add firefox-devtools-mcp -- npx -y @mozilla/firefox-devtools-mcpRun in your terminal. Add --scope user to use it in every project.
{
"mcpServers": {
"firefox-devtools-mcp": {
"command": "npx",
"args": [
"-y",
"@mozilla/firefox-devtools-mcp"
]
}
}
}Settings, Developer, Edit config. Paste into claude_desktop_config.json and restart.
Step-by-step: install Firefox DevTools MCP in Claude Desktop
{
"mcpServers": {
"firefox-devtools-mcp": {
"command": "npx",
"args": [
"-y",
"@mozilla/firefox-devtools-mcp"
]
}
}
}Add to ~/.cursor/mcp.json (all projects) or .cursor/mcp.json (this project).
{
"servers": {
"firefox-devtools-mcp": {
"command": "npx",
"args": [
"-y",
"@mozilla/firefox-devtools-mcp"
]
}
}
}Add to .vscode/mcp.json. VS Code uses "servers", not "mcpServers".
codex mcp add firefox-devtools-mcp -- npx -y @mozilla/firefox-devtools-mcp{
"mcpServers": {
"firefox-devtools-mcp": {
"command": "npx",
"args": [
"-y",
"@mozilla/firefox-devtools-mcp"
]
}
}
}Add to ~/.gemini/config/mcp_config.json (all projects) or .agents/mcp_config.json (this project).
Step-by-step: install Firefox DevTools MCP in Antigravity CLI
gemini mcp add firefox-devtools-mcp npx -y @mozilla/firefox-devtools-mcpGemini CLI was replaced by Antigravity CLI in June 2026 and remains only for enterprise licences and paid API keys.
MCP servers run with your permissions and can read what you give them access to. Some need an API key: check the README and add it under env in the firefox-devtools-mcp block.
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Firefox DevTools MCP: common questions
How do I install Firefox DevTools MCP?
In Claude Code run claude mcp add firefox-devtools-mcp -- npx -y @mozilla/firefox-devtools-mcp. For Claude Desktop, Cursor and VS Code, paste the config shown above and restart. See the install guides.
Is Firefox DevTools MCP the official server?
Firefox DevTools MCP is a community project by mozilla, not verified by a company domain.
Is Firefox DevTools MCP free?
The code is published under the NOASSERTION licence. The service it connects to may have its own pricing.
Is Firefox DevTools MCP safe to use?
It scores 81 of 100. Grades: maintenance A, licence F, quality A. The security check has not run for it yet. Review the code before you install. How grades work.
What are alternatives to Firefox DevTools MCP?
Similar MCP servers: mockserver, XcodeBuildMCP, Repowise, SmartBear MCP.
Does Firefox DevTools MCP work with ChatGPT?
Not directly. It runs locally, and ChatGPT only connects to remote servers with a URL. Use it in Claude Code, Claude Desktop, Cursor, VS Code or Codex.