Anthropic just gave Claude Cowork its own browser, and for anyone juggling AI chores and real work the timing could not be better. Instead of borrowing your everyday Chrome window, Claude now opens a dedicated side-panel browser inside the desktop app, where it can navigate web pages, read content, click buttons, type into fields and fill out forms on its own. The rolling starts this week for Pro, Max and Team users on macOS, Windows and Linux, with Linux support currently in beta.
The headline feature is separation. This is Claude's browser, not yours. Anthropic says the AI cannot see your existing tabs, bookmarks or saved passwords, which closes off a whole class of "the assistant wandered into my banking session" accidents before they start. It also frees you to keep working in your own window while Claude quietly collects the numbers, downloads the invoices or fills the form in the background.
Here is a practical walkthrough of what the new browser does, how to turn it on, and how to use it without inviting trouble.
What the built-in browser actually does
When a task needs a website, Claude Cowork opens the page in a side panel inside the desktop app and interacts with it directly. That covers the everyday busywork you have been copying and pasting by hand: pulling figures off a dashboard, retrieving invoices from a vendor portal, filling out a form or gathering information for a report.
The key gain is transparency. Much of what the model does in the browser was technically possible through its web function before, but now you can watch each step happen in the panel instead of trusting a summary. You see the page Claude is on, what it clicked and what it typed, which makes it far easier to spot when something has gone sideways.
Anthropic has also introduced a built-in browser for Claude Code on the desktop, following the same separation logic for coding workflows.
How to get started in four steps
Setup is straightforward and mostly a matter of deciding which browser you trust with which task.
- Update the Claude desktop app and confirm you are on a Pro, Max or Team plan. Enterprise administrators can turn the feature on for their whole organisation through Cowork settings.
- If you already have the Claude in Chrome extension installed, it stays your default. To use the new standalone browser instead, open Cowork settings and change the Preferred Browser once.
- If you want Claude to reach logged-in sites, transfer logins from Chrome, Edge or Firefox on macOS, and Firefox on Windows and Linux, on a site-by-site basis. Nothing is transferred automatically.
- Decide on sensitive categories explicitly. Banking, email and single sign-on are excluded by default, and you only open them up if you choose to include them.
Built-in browser vs Claude in Chrome
The two tools are not competing so much as covering different jobs, and knowing which to reach for saves time.
- Choose the Chrome extension when you need Claude to work directly on a page you already have open and logged in: editing a document, managing an inbox or updating a CRM.
- Choose the built-in browser when a task can run in the background while you get on with something else: research and data collection, or scraping figures from sites that do not need your session.
- Keep in mind that web users and mobile users cannot harness the new browser yet. It runs exclusively inside the desktop app.
In plain terms, the extension is for chores tied to your open tab and your login, while the internal browser is for errands that can run hands-free.
Security tips before you let Claude loose.
Giving an AI the ability to click and type on websites always introduces a new attack surface, and Anthropic is upfront that the built-in browser inherits the risks of any browser-controlled agent.
- Watch for prompt injection. Hidden or misleading instructions on a webpage can try to steer an AI into an action you never asked for, so treat unfamiliar pages with caution.
- Rely on the safeguards, but do not lean on them. The browser ships with the same checks used in Claude in Chrome, including comparing Claude's actions against your original request. They reduce the risk; they do not eliminate it.
- Start with trusted sites. Get comfortable watching Claude on domains you know before pointing it at the wilder corners of the internet.
The bigger story here is less about the browser itself and more about what it enables. Claude is moving from answering questions to completing tasks, and doing it in a sandbox that leaves your personal browsing untouched. Set it up thoughtfully, pick your preferred browser per job, and keep an eye on the side panel. Done right, it is one of the most useful hands-free workhorses Anthropic has shipped for the desktop.
Comments