Anthropic Brings Claude Cowork to Chrome Sidebar, Enabling Cross-Device AI Work Sessions

Claude Cowork Transforms Chrome Extension Into Full AI Work Assistant

Anthropic has upgraded its Claude for Chrome browser extension to support full Claude Cowork sessions directly in the Chrome sidebar1

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. This integration means conversations held in the side panel now become part of the user's conversation history, and their skills and connectors automatically work within the browser2

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. The AI chatbot can start tasks in a Claude app and continue them seamlessly in a Chrome browser or vice versa, addressing a longstanding workflow interruption where browser sessions stayed completely separate from other devices3

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Seamless Cross-Device AI Sessions Change How Users Work

The AI-powered work assistant now enables users to maintain context as they move between desktop, web, and mobile platforms. Sessions live with the user's account rather than a single device, allowing work started in a browser to be picked up later on desktop or mobile apps2

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. This proves particularly valuable for multi-step projects like creating budget spreadsheets that require pulling invoices from multiple vendor portals. Claude Cowork can gather amounts and dates from various sources before building the spreadsheet, then users can continue the session in the desktop app to add files from their computer or compare against previous budgets2

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Browser Automation Extends Reach to Unconnected Tools

While Anthropic has secured integrations with numerous professional and lifestyle services, many tools like internal dashboards, legacy systems, and vendor portals lack official support1

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. The Chrome browser extension solves this by allowing Claude to interact with web pages directly, including clicking links, typing text, filling out forms, and navigating between pages using existing logins3

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. This capability to run in a Chrome sidebar and execute tasks in tools without official integration provides a workaround for accessing systems that would otherwise remain isolated from AI assistance.

Security Measures Address Prompt Injection Risks

Anthropic implemented safeguards against prompt injection attacks, where hidden instructions buried in webpages or documents could redirect the AI without user knowledge3

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. The company added user confirmation steps that review any consequential action against the original request before execution. Claude will ask permission before performing major actions such as submitting forms, sending messages, downloading files, making purchases, or sharing personal information2

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. This addresses growing concerns around browser automation security as AI agents gain more capabilities to act independently within user environments.

Rollout Timeline and Availability Across Plans

Max and Team subscribers can access Claude Cowork in the Chrome sidebar immediately or install the extension from the Chrome Web Store now2

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. Pro plans will receive access in the coming weeks1

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. Enterprise admins can enable the feature selectively by domain, providing granular control over deployment3

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. Claude Code, the professional-grade option for coding and programming with Anthropic's AI models, was already available in the Chrome plugin before this update1

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. Claude Cowork launched as a more streamlined option intended for layperson users, and the company recently added smartphone control capability1

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. The broader Claude for Chrome extension rolled out to all Anthropic users in late 20251

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. This integration positions Google Chrome as a central hub for AI-assisted workflows, particularly for knowledge workers juggling tasks across disconnected systems and platforms.