What is the key difference between Selenium MCP Server and Firefox Devtools MCP?

Selenium MCP Server 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 Selenium MCP Server 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 Selenium MCP Server and Firefox Devtools MCP free or paid?

Selenium MCP Server 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?

Selenium MCP Server lists 6 tools with 2 views and 11 GitHub stars. Firefox Devtools MCP lists 4 tools with 2 views and 417 GitHub stars.

Can I use both Selenium MCP Server 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

Selenium MCP Server vs Firefox Devtools MCP

In-depth architectural comparison of the Selenium MCP Server 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

Selenium MCP Server

Browser Automation · Local stdio

Quality: 44/100 (Fair) | Auth: No auth required

Firefox Devtools MCP

Browser Automation · Local stdio

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

Verdict Summary: Choose Selenium MCP Server 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 Selenium MCP Server 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: Navigate URLs with timeout and readiness checks, Find elements by text, class, ID, attributes, XPath, and iframe, Click elements and set input values.

Explore Selenium MCP Server 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.

Feature & Specification Comparison

Specification	Selenium MCP Server PhungXuanAnh Browser Automation	Firefox Devtools MCP freema Browser Automation
Summary	A Model Context Protocol server providing web automation capabilities through Selenium WebDriver	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

Tools & Capabilities Breakdown

Selenium MCP Server Tools (6)

Navigate URLs with timeout and readiness checks

Find elements by text, class, ID, attributes, XPath, and iframe

Click elements and set input values

Capture screenshots of browser windows

Retrieve element CSS styles and computed styles

Access browser console and network logs with filtering

Firefox Devtools MCP Tools (4)

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).

Selenium MCP Server Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "phungxuananh-selenium-mcp-server": {
      "command": "uvx",
      "args": [
        "mcp-server-selenium"
      ]
    }
  }
}

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

Selenium MCP Server 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 Selenium MCP Server when you need capabilities focused on browser automation and Firefox Devtools MCP when you require tools for browser automation.

More alternatives to Selenium MCP Server More alternatives to Firefox Devtools MCP Browser Automation category hub Canonical compare URL