Firefox DevTools MCP
Control and debug Firefox: navigate, fill forms, inspect network and console, profile.
Install
registry version 0.10.7
npm
npx -y @mozilla/firefox-devtools-mcpnpm
npx -y @mozilla/firefox-devtools-mcp@0.10.7
Setup by client
Pick your client — the config below is generated for this server (local stdio). Copy respects the “Pin version” switch above.
claude_desktop_config.json
{
"mcpServers": {
"firefox-devtools-mcp": {
"command": "npx",
"args": [
"-y",
"@mozilla/firefox-devtools-mcp"
]
}
}
}{
"mcpServers": {
"firefox-devtools-mcp": {
"command": "npx",
"args": [
"-y",
"@mozilla/firefox-devtools-mcp@0.10.7"
]
}
}
}Format verified against the official Claude Desktop docs ↗.
terminal
claude mcp add firefox-devtools-mcp -- npx -y @mozilla/firefox-devtools-mcp
claude mcp add firefox-devtools-mcp -- npx -y @mozilla/firefox-devtools-mcp@0.10.7
Format verified against the official Claude Code docs ↗.
.cursor/mcp.json
{
"mcpServers": {
"firefox-devtools-mcp": {
"command": "npx",
"args": [
"-y",
"@mozilla/firefox-devtools-mcp"
]
}
}
}{
"mcpServers": {
"firefox-devtools-mcp": {
"command": "npx",
"args": [
"-y",
"@mozilla/firefox-devtools-mcp@0.10.7"
]
}
}
}Format verified against the official Cursor docs ↗.
.vscode/mcp.json
{
"servers": {
"firefox-devtools-mcp": {
"command": "npx",
"args": [
"-y",
"@mozilla/firefox-devtools-mcp"
]
}
}
}{
"servers": {
"firefox-devtools-mcp": {
"command": "npx",
"args": [
"-y",
"@mozilla/firefox-devtools-mcp@0.10.7"
]
}
}
}Format verified against the official VS Code docs ↗.
mcp_config.json
{
"mcpServers": {
"firefox-devtools-mcp": {
"command": "npx",
"args": [
"-y",
"@mozilla/firefox-devtools-mcp"
]
}
}
}{
"mcpServers": {
"firefox-devtools-mcp": {
"command": "npx",
"args": [
"-y",
"@mozilla/firefox-devtools-mcp@0.10.7"
]
}
}
}Format verified against the official Windsurf docs ↗.
Environment variables
Defined in the server's official registry manifest. Required secrets are shown as <YOUR_…> placeholders in the configs above.
FIREFOX_HEADLESS— Set to true to run Firefox without a visible window.START_URL— URL to open when the server starts.
GitHub
⭐ 487 stars · 最近更新于 29 天前
About this server
Firefox DevTools MCP Model Context Protocol server for automating Firefox via WebDriver BiDi (through Selenium WebDriver). Wor…
Summary from the project README — github.com/mozilla/firefox-devtools-mcp
Distributed as npm, listed under Browser Automation. Review our MCP security guide before granting access to real data.
Frequently asked questions
What does the Firefox DevTools MCP MCP server do?
Firefox DevTools MCP Model Context Protocol server for automating Firefox via WebDriver BiDi (through Selenium WebDriver). Wor
How do I install Firefox DevTools MCP?
Run the install command shown above, then paste the config for your client (Claude Desktop, Claude Code, Cursor, VS Code or Windsurf) into its MCP settings and restart the client.
Is Firefox DevTools MCP free to use?
The MCP server itself is free to install. The source is public on https://github.com/mozilla/firefox-devtools-mcp. Any third-party service it calls may require its own API key and account.
Which clients support Firefox DevTools MCP?
Any MCP-compatible client can use it, including Claude Desktop, Claude Code, Cursor, VS Code, Windsurf and custom agents.
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