Google has shipped an update to its Chrome DevTools MCP (Model Context Protocol) server that lets coding agents connect directly to active, live browser sessions — announced December 11, 2025, and requiring Chrome M144 or later. Chrome DevTools engineers Sebastian Benz and Alex Rudenko co-authored the feature. Previously, agents had to operate in isolated browser profiles, losing access to cookies, session tokens, and any ongoing debugging state. Now they can reuse an authenticated session, so a developer asking an agent to investigate a bug behind a sign-in wall no longer has to re-authenticate first.
The implementation builds on Chrome's existing remote debugging infrastructure. Remote debugging is off by default; developers must enable it at chrome://inspect#remote-debugging. Once active, the MCP server can launch with the --autoConnect flag, which requests a remote debugging session from the running Chrome instance. Chrome presents a permission dialog on each request and keeps a persistent "Chrome is being controlled by automated test software" banner visible throughout the session. Chrome M144 is currently in Beta; stable channel availability is pending.
The practical payoff is context handoff. If a developer has a failing network request open in the Network panel, or a suspect element highlighted in the Elements panel, they can pass that live debugging state to an agent without resetting their workspace. The agent picks up where the developer left off — no re-navigation, no re-authentication, no reconstructing what was already on screen.
The update reflects Google's deepening investment in MCP, the protocol Anthropic originally developed that has since been adopted across the industry as a standard interface for connecting agents to external tools, from browser-specific implementations like <a href="/news/2026-03-14-agent-browser-protocol-abp-chromium-fork-ai-agent-web-navigation">Agent Browser Protocol</a> to existing development tools. Google said it plans to expose additional DevTools panel data to agents over time, though it has not specified which panels are next on the list.