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

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

How do I install Firefox Devtools MCP or Manzanas 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 Firefox Devtools MCP and Manzanas free or paid?

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

Which MCP server has more tools and community activity?

Firefox Devtools MCP lists 4 tools with 2 views and 398 GitHub stars. Manzanas lists 6 tools with 5 views and 21 GitHub stars.

Can I use both Firefox Devtools MCP and Manzanas 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

Firefox Devtools MCP vs Manzanas

In-depth architectural comparison of the Firefox Devtools MCP and Manzanas 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

Firefox Devtools MCP

Browser Automation · Local stdio

Quality: 63/100 (Good) | Auth: No auth required

Manzanas

Browser Automation · Local stdio

Quality: 79/100 (Great) | Auth: No auth required

Verdict Summary: Choose Firefox Devtools MCP if you need specialized Browser Automation tools running via a local process. Choose Manzanas 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 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: slim, developer, mozilla.

Explore Firefox Devtools MCP Details

Choose Manzanas 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: Accessibility-based UI inspection and interaction, TTL leases with FIFO queuing, Warm simulator park and thaw.

Feature & Specification Comparison

Specification	Firefox Devtools MCP freema Browser Automation	Manzanas VerifiedBrowser Automation
Summary	Firefox browser automation via WebDriver BiDi for testing, scraping, and browser control. Supports snapshot/UID-based interactions, network monitoring, console capture, and screenshots.	Drive iOS simulators from Claude Code, Cursor or Codex by accessibility label instead of screenshot-and-tap-coordinates. Exposes ui_tree, tap_element, type_into_element, wait_for_element and scroll_to_element, and every action reports whether the UI actually changed. A Mac daemon underneath hands out simulators as TTL leases with a queue and keeps a SIGSTOP warm pool, so a lease gets a live simulator in about 0.28s instead of a 7s cold boot, and multiple agents can share one Mac without colliding. Open source, MIT.

Tools & Capabilities Breakdown

Firefox Devtools MCP Tools (4)

slim

`pages`, `snapshot`, `input`, `screenshot`

developer

`basic` plus `debugging`, `network`, `console`, `profiler`

mozilla

`developer` plus `prefs`, `privileged`

all

every module

Manzanas Tools (6)

Accessibility-based UI inspection and interaction

TTL leases with FIFO queuing

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).

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"
      }
    }
  }
}

Manzanas Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "manzanas": {
      "command": "npx",
      "args": [
        "-y",
        "manzanasd-client@latest"
      ]
    }
  }
}

Frequently Asked Questions

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

More alternatives to Firefox Devtools MCP More alternatives to Manzanas Browser Automation category hub