Firefox DevTools MCP for Claude Desktop
io.github.mozilla/firefox-devtools-mcp
Control and debug Firefox: navigate, fill forms, inspect network and console, profile.
client:Claude Desktop
transport:stdio
runtime:npm
Install Firefox DevTools MCP in Claude Desktop
~/Library/Application Support/Claude/claude_desktop_config.json · windows: %APPDATA%\Claude\claude_desktop_config.json
{
"mcpServers": {
"firefox-devtools-mcp": {
"command": "npx",
"args": [
"-y",
"@mozilla/firefox-devtools-mcp"
],
"env": {
"FIREFOX_HEADLESS": "<FIREFOX_HEADLESS>",
"START_URL": "<START_URL>"
}
}
}
}Settings → Developer → Edit Config opens this file. Restart the app after saving. Claude Desktop docs