// MCP TOOL REFERENCE

FIREFOX MCP SERVER TOOLS

29 tools from the Firefox MCP Server MCP Server, categorised by risk level.

// ALL 29 FIREFOX MCP SERVER TOOLS

READ 11 tools

Read debug_performance_metrics Get detailed performance metrics including timing, memory usage, and paint events. Essential for performanc... Read debug_activity_all Get a comprehensive feed combining console logs, errors, network activity, and WebSocket messages. Perfect ... Read debug_console_logs Retrieve captured browser console messages (log, error, warn, info, debug). Essential for debugging JavaScr... Read debug_javascript_errors Get JavaScript errors and exceptions with full stack traces. Critical for identifying and debugging client-... Read html_extract Extract HTML content from the page or specific elements. Perfect for content analysis and data scraping. Read page_screenshot Capture screenshot of the current page or specific elements. Essential for visual verification and document... Read session_list List all active browser sessions with their URLs and status. Useful for managing multiple test scenarios. Read text_extract Extract visible text content from the page or specific elements. Ideal for reading displayed information an... Read url_get_current Get the current URL of the active page or specified session. Read debug_network_activity Monitor HTTP requests, responses, and network timing. Perfect for API debugging and performance analysis. Read debug_websocket_messages Capture WebSocket traffic including Phoenix LiveView messages. Ideal for real-time application debugging an...

WRITE 1 tools

Write session_set_active Set which browser session should be the default target for subsequent operations.

DESTRUCTIVE 3 tools

Destructive debug_buffers_clear Clear accumulated debug data buffers to free memory and start fresh monitoring. Destructive browser_close Close the entire browser instance and clean up all sessions and resources. Destructive session_close Close a specific browser session and clean up its resources.

EXECUTE 14 tools

Execute browser_launch Launch Firefox browser with multi-session support and comprehensive debugging capabilities. Perfect for tes... Execute debug_monitoring_start Start or restart comprehensive monitoring for console logs, errors, network activity, and WebSocket messages. Execute element_wait Wait for specific elements to appear or become visible. Essential for handling dynamic content and loading ... Execute javascript_execute Execute custom JavaScript code in the browser context. Powerful for advanced DOM manipulation, data extract... Execute page_navigate Navigate to a specific URL in the browser. Works with any web page or web application. Execute debug_helpers_inject Inject custom debugging utilities and helper functions into the page context for enhanced debugging capabil... Execute element_click Click on any element using CSS selector or exact coordinates. Essential for interacting with buttons, links... Execute element_drag Perform drag and drop operations or move sliders/draggable elements with smooth animations and precise cont... Execute history_back Navigate back in browser history, like clicking the back button. Execute history_forward Navigate forward in browser history, like clicking the forward button. Execute input_type Type text into input fields, text areas, or any editable element. Perfect for form filling and text input. Execute keyboard_press Send keyboard events with support for modifier keys and repetition. Ideal for arrow keys, shortcuts, and sp... Execute page_reload Reload the current page, refreshing all content and JavaScript state. Execute session_create Create a new browser session (tab) with complete isolation - separate cookies, storage, and debugging. Esse...

// FAQ

How many tools does the Firefox MCP Server MCP server have? +

The Firefox MCP Server MCP server exposes 29 tools across 4 categories: Read, Write, Destructive, Execute.

How do I enforce policies on Firefox MCP Server tools? +

Route the Firefox MCP Server server through the PolicyLayer gateway. Define allow, deny, or approval rules per tool in the dashboard; they are enforced on every call before it reaches the server.

What risk categories do Firefox MCP Server tools fall into? +

Firefox MCP Server tools are categorised as Read (11), Write (1), Destructive (3), Execute (14). Each category has a recommended default policy.

Enforce policy on every Firefox MCP Server tool call.

Start from Firefox MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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