Connects Claude to a live Chrome browser session through a WebSocket bridge and extension. Instead of dumping the entire DOM into context after every action, it sends a stripped down HTML snapshot that keeps text and interactive elements but drops the bloat. You install the extension, point it at an LLM (they recommend Gemini Flash), and invoke the browser-agent tool with a natural language prompt like "search for MCP protocol on Google." Good fallback when a site doesn't have a dedicated MCP server. Runs locally in your browser, no remote calls except to your LLM provider. The extension listens on port 9003 and executes whatever automation task you throw at it.
claude mcp add --transport stdio io.github.runbook-ai-browser-agent -- npx -y runbook-ai-mcp