Google's coding agent can now open its own browser tabs, test your app live, and run several web tasks at once
Google Antigravity is rolling out browser use in its desktop app, so the agent can research, write code and then check the result live in a browser without you switching windows. In the app it uses the built-in side-panel browser, starts from a plain-language request or /browser, and can run several browser subagents in parallel, each in its own isolated tab that you can watch live and stop. You decide what it logs into through a separate browser profile with a pause-and-resume login handoff, and since v2.31 any file download pauses until you approve it.
Why it matters
Closing the loop between writing code and checking it in a real page catches broken UI and failed requests the agent would otherwise report as done.
Who it's for
Web developers and anyone using Antigravity to build or test sites and web apps.
How to try it
- Update the Antigravity app; browser use may take a few days to reach your account.
- Ask in plain language, for example: "Start the dev server, open the signup page and check the form works on mobile width."
- Sign in to test accounts only when the agent pauses for a login, and approve downloads one by one.
- For performance traces or Lighthouse audits, use /browser with local Chrome in the CLI.
Plan & availability: Rolling out gradually in the Antigravity app (built-in browser for personal accounts from v2.30.0). The CLI and business/enterprise app use /browser with your local Chrome 144+ via Chrome DevTools MCP; admins can turn the browser subagent off. Antigravity has a free plan with a weekly agent quota and paid Google AI plans. Checked on antigravity.google docs and the official X post on November 11, 2026.
Source: @antigravity on X ↗
Written by AgentStackList from the original post. Checked Nov 11, 2026. Features, plans and availability can change, so confirm on the source before you rely on it.
antigravitybrowser-agenttestinggoogleweb-dev
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