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mcp/harbor
Zed

Firefox DevTools MCP for Zed

io.github.mozilla/firefox-devtools-mcp

Control and debug Firefox: navigate, fill forms, inspect network and console, profile.

client:Zed transport:stdio runtime:npm

Install Firefox DevTools MCP in Zed

~/.config/zed/settings.json · windows: %APPDATA%\Zed\settings.json

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

{
  "context_servers": {
    "firefox-devtools-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@mozilla/firefox-devtools-mcp"
      ],
      "env": {
        "FIREFOX_HEADLESS": "<FIREFOX_HEADLESS>",
        "START_URL": "<START_URL>"
      }
    }
  }
}

Merge this into your existing settings object — do not replace the file. Zed docs

Firefox DevTools MCP in other clients

Firefox DevTools MCP MCP server