Claude in Chrome

Deep Dive: Claude in Chrome

Claude in Chrome is a browser extension from Anthropic that lets the Claude agent read, click, and navigate websites directly inside Chrome, next to the user. Claude runs in a Chrome side panel and operates the pages you have open: it clicks through menus, fills forms, pulls data together, and reports back in the panel. The extension started in August 2025 as a research preview called Claude for Chrome, opened to all Max users in November 2025, and since the August 12, 2026 update, a side-panel session is a full Claude Cowork client — sessions, skills, and connectors carry over between the desktop, web, and mobile apps. It is available on all paid plans, starting at $20 per month (Pro), and pairs with Claude Code in a build-test-verify loop: build in the terminal, deploy to a URL, and let Claude verify the result in the browser. A concrete example: a support team has Claude in Chrome open 47 refund tickets, check each against the refund policy, and draft 47 replies in the side panel — a person reviews and sends. The boundary to Computer Use: Computer Use is a general API capability that controls an entire screen via screenshots and mouse coordinates, while Claude in Chrome is limited to the browser and reads the page structure directly. Both share the same core risk, prompt injection: hidden instructions on a website can steer the agent. Anthropic counters with safety classifiers, site-level permissions, and the advice to supervise sensitive actions.