Claude in Chrome 侧边栏升级为 Claude Cowork 会话

Core Highlights

Anthropic's Claude browser extension for Chrome has received a significant upgrade that changes how people use the assistant while surfing the web. The previously simple conversation sidebar pinned to the right side of the browser has now officially evolved into a fully functional Claude Cowork conversation interface. While this change may appear on the surface to be merely a shift in interface form, it actually redefines how users collaborate with Claude within the web browsing environment and brings the assistant much closer to where real work happens on a daily basis. The move signals that Anthropic intends the browser to be a first-class surface for its agentic features rather than a sideshow, and it reflects a broader industry trend of embedding assistants directly into the tools that knowledge workers already use every single day. For many users, the sidebar is the only place they ever touch Claude, so making it a real workspace matters far more than adding features elsewhere in the product where nobody will see them.

Specific Capabilities and What Happened

After the upgrade, every conversation a user starts in the Chrome sidebar is automatically saved to the history, and it no longer disappears when the tab is closed as it used to in earlier versions of the extension that treated each session as throwaway. Whether a person is on the desktop client, the web version, or the mobile app, they can seamlessly continue the same conversation context, and task progress is never interrupted by switching devices during the day. Skills and connectors, for the first time, can run directly inside the browser, which means users no longer need to jump to a standalone application in order to invoke relevant tools and external services while browsing the web. A research task started on a laptop in the afternoon can be picked up on a phone in the evening without losing any context, and the same connectors keep working across these surfaces without any extra setup or reconfiguration. The practical effect is that the browser becomes a continuous working environment rather than a series of disconnected sessions that reset every time the window closes and forget what you were doing.

Technical Details

In the past, the sidebar was essentially a lightweight entry point that could only handle basic question and answer exchanges with short replies and no persistent state worth keeping. Today it carries the complete Cowork session state, including long-term memory, loaded skill configurations, and connector authorization information that used to live only inside the main application and was invisible to the browser. By deeply binding the session state to the account system, Anthropic has achieved reliable cross-device synchronization that survives restarts and device changes without manual export. Behind this change lies a unified session storage service and an incremental synchronization mechanism that keeps the experience consistent across desktop, web, and mobile clients, so that a user always sees the same thread regardless of the device they pick up at any given moment during the day. This architecture is what makes the promised seamlessness actually function in practice rather than remaining a vague marketing claim that breaks on the first device switch.

Comparison with Competitors

Compared with other products that treat the browser sidebar as a quick question and answer box, Claude's approach is closer to moving the entire workspace into the browser where the user already spends their time. Competitors often stop at simple summarization and translation of the current page, whereas Claude Cowork brings skill execution and connector invocation into the web environment as well, giving it a clearly higher depth of collaboration. The difference is not just convenience but the ability to act on web content through connected tools rather than only describing it, which is what separates a true coworking assistant from a passive reader that merely echoes the page back to you. Other vendors may add a chat bubble to the side of the screen, but few have wired their full agent runtime into the panel the way Anthropic now has, and that gap shows in what the assistant can actually accomplish.

Industry Impact and Use Cases

For researchers, product managers, and content creators who heavily rely on web-based office work, this upgrade means AI collaboration can truly be integrated into daily workflows instead of sitting in a separate tab that people forget to check. Put simply, the browser is no longer just a browsing tool but has become an always-available intelligent workspace where reading, analysis, and action happen together in one place. As more work moves into the browser, embedding the assistant directly inside it reduces the friction of copying text back and forth and keeps people in flow, which is likely to become the default expectation for AI assistants going forward. The change also lowers the barrier for casual users who never installed a desktop app but live inside Chrome all day, because the capability now meets them exactly where they already are without asking them to change habits.