What is the key difference between Gecko MCP and Firefox Devtools MCP?

Gecko MCP belongs to the Browser Automation category with local stdio execution, while Firefox Devtools MCP belongs to the Browser Automation category with local stdio execution.

How do I install Gecko MCP or Firefox Devtools MCP in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are Gecko MCP and Firefox Devtools MCP free or paid?

Gecko MCP operates under a Free / Open Source model (No auth required). Firefox Devtools MCP operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Gecko MCP lists 36 tools with 0 views and 2 GitHub stars. Firefox Devtools MCP lists 34 tools with 2 views and 428 GitHub stars.

Can I use both Gecko MCP and Firefox Devtools MCP together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

Side-by-Side Model Context Protocol Comparison

Gecko MCP vs Firefox Devtools MCP

In-depth architectural comparison of the Gecko MCP and Firefox Devtools MCP MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

At a Glance & Executive Verdict

Gecko MCP

Browser Automation · Local stdio

Quality: 51/100 (Good) | Auth: No auth required

Firefox Devtools MCP

Browser Automation · Local stdio

Quality: 65/100 (Great) | Auth: No auth required

Verdict Summary: Choose Gecko MCP if you need specialized Browser Automation tools running via a local process. Choose Firefox Devtools MCP if your workspace requires Browser Automation integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Gecko MCP when:

You need dedicated capabilities in the Browser Automation domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: list_tabs, open_tab, get_active_tab.

Explore Gecko MCP Details

Choose Firefox Devtools MCP when:

You need dedicated capabilities in the Browser Automation domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
You have access to required keys: START_URL, FIREFOX_HEADLESS, ACCEPT_INSECURE_CERTS, CONNECT_EXISTING, MARIONETTE_PORT, TOOL_PRESET, ENABLE_SCRIPT, ENABLE_PRIVILEGED_CONTEXT.
Primary tools included: list_pages, new_page, navigate_page.

Feature & Specification Comparison

Specification	Gecko MCP Browser Automation	Firefox Devtools MCP freema Browser Automation
Summary	Control Firefox browsers (Floorp, LibreWolf, Zen, Firefox) from any MCP client.	Firefox browser automation via WebDriver BiDi for testing, scraping, and browser control. Supports snapshot/UID-based interactions, network monitoring, console capture, and screenshots.
Category & Scope	Browser Automation

Tools & Capabilities Breakdown

Gecko MCP Tools (36)

list_tabs

List all open tabs (title, URL, browserId, active, pinned).

open_tab

Open a new tab at a URL; **returns the new tab's `browserId`** so you can target it.

get_active_tab

Return the active tab's title, URL and browserId.

navigate_tab

Navigate an existing tab to a URL.

close_tab

Close a tab.

read_page

Read a tab's content as clean Markdown (or HTML / accessibility tree). Output is capped (default 25 KB) to protect the context.

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

Gecko MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "gecko-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "gecko-mcp"
      ]
    }
  }
}

Firefox Devtools MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "freema-firefox-devtools-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@mozilla/firefox-devtools-mcp@latest"
      ],
      "env": {
        "START_URL": "YOUR_START_URL_HERE",
        "FIREFOX_HEADLESS": "YOUR_FIREFOX_HEADLESS_HERE",
        "ACCEPT_INSECURE_CERTS": "YOUR_ACCEPT_INSECURE_CERTS_HERE",
        "CONNECT_EXISTING": "YOUR_CONNECT_EXISTING_HERE",
        "MARIONETTE_PORT": "YOUR_MARIONETTE_PORT_HERE",
        "TOOL_PRESET": "YOUR_TOOL_PRESET_HERE",
        "ENABLE_SCRIPT": "YOUR_ENABLE_SCRIPT_HERE",
        "ENABLE_PRIVILEGED_CONTEXT": "YOUR_ENABLE_PRIVILEGED_CONTEXT_HERE"
      }
    }
  }
}

Frequently Asked Questions

Gecko MCP is categorized under Browser Automation and uses a local stdio subprocess. In contrast, Firefox Devtools MCP belongs to Browser Automation using local stdio subprocess. Select Gecko MCP when you need capabilities focused on browser automation and Firefox Devtools MCP when you require tools for browser automation.