Claude in Chrome just got a meaningful upgrade. The browser extension's side panel now runs a full Claude Cowork session, the same one tied to your account across desktop, web, and mobile. Conversations you start in a Chrome tab carry over to the desktop app or your phone without any manual handoff.

One session, every surface

Previously, the Chrome extension lived in its own isolated context. Now, the side panel runs a full Cowork session, and the skills, plugins, and connectors you've already built are available with nothing to set up in the browser.

Every conversation saves to your history. Sessions live with your account rather than the machine, so you can begin in Chrome and pick up on desktop or mobile without re-explaining anything. Cowork runs in the cloud and syncs to your Claude account, letting you kick off a task at your desk and check status from your phone on the train home.

What Cowork actually is

For anyone who hasn't used it yet, Claude Cowork (short for "collaborative work") is Anthropic's persistent agent workspace. Chats, projects, and artifacts sit together in one place, and an agent can act across them rather than in a single throwaway conversation. Think of it as a long-running session where Claude has memory, tools, and context, instead of a fresh chat each time you open a tab.