debug_websocket_messages

MCP tool from Firefox MCP Server by JediLuke

Capture WebSocket traffic (LiveView-friendly)

How to use it

debug_websocket_messages is exposed by the Firefox MCP Server MCP server. Add the server to your MCP client (Claude Desktop, Cursor, Windsurf and others), and the debug_websocket_messages tool becomes available to the model automatically. See the full listing for setup details and every tool this server provides.

Install Firefox MCP Server

$npx playwright install firefox

FULL FIREFOX MCP SERVER LISTING

Other tools in Firefox MCP Server (27)

Close browser and clean up all resources

Launch Firefox with debugging capabilities

debug_activity_all

Combined feed of all debugging information

debug_buffers_clear

Clear accumulated debug data

debug_console_logs

Monitor browser console output

debug_helpers_inject

Inject custom debugging utilities

debug_javascript_errors

Track JavaScript errors and exceptions

debug_monitoring_start

Start comprehensive monitoring

debug_network_activity

Monitor HTTP requests and responses

debug_performance_metrics

Get timing and memory usage data

Click elements by selector or coordinates

Drag and drop with smooth animations

Wait for elements to appear or become visible

/ historyforward - Browser history navigation

Extract HTML content from page or elements

Type text into input fields and text areas

javascript_execute

Run custom JavaScript in browser context

Send keyboard events with modifier support

Navigate to any URL

Refresh current page

page_screenshot

Capture screenshots with flexible options

Close specific session and free resources

Create isolated browser session with independent state

List all active sessions with URLs and status

session_set_active

Set default session for subsequent operations

Get visible text content

url_get_current

Get current page URL