IDE browser overview

In the Antigravity IDE (v2.6.0+) and the Google Antigravity VS Code extension (v1.9.0+), the agent can open, read, and actuate a local Google Chrome browser through /browser to test local development sites, read documentation, and verify visual changes.

Tip

Looking for zero-setup built-in browser automation? The built-in side-panel browser, plain-language auto-invocation, parallel browser tabs, live animated cursor, and pause-and-resume sign-in handoff are available exclusively in the Antigravity App (v2.30.0+, personal Google Accounts). Antigravity IDE doesn’t include a built-in browser and always runs browser tasks in your local Google Chrome when you invoke /browser.

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Prerequisites and setup

Type /browser followed by your task in the Antigravity panel to delegate a web check to the browser subagent (plain-language prompts don’t auto-launch the browser subagent in the IDE). The subagent drives your local Google Chrome through the Chrome DevTools MCP server, which Antigravity IDE starts with npx:

1. Install Node.js so that npx is available on your PATH.
2. Open Google Chrome (version 144 or later) on the same machine as your workspace, go to chrome://inspect/#remote-debugging, and turn on Allow remote debugging for this browser instance (refer to Set up Chrome).
3. Run /browser <task> in the Antigravity panel, and click Allow within 60 seconds when Chrome asks whether to allow remote debugging.

Note

Local workspaces only: Because the Chrome DevTools MCP server runs alongside the workspace agent process, /browser works in local workspaces where Antigravity IDE and Google Chrome run on the same computer. In Remote-SSH, Dev Containers, or cloud workstation sessions, the remote agent host can’t attach to Chrome on your local machine.

Capabilities and settings

Once connected to Chrome, the browser subagent can navigate pages, click and fill in forms, inspect console messages and network requests, run performance traces and Lighthouse audits, take screenshots, and optionally record page interactions as a WebM video (refer to Browser recordings). Because /browser shares a single live Chrome connection and your active Chrome profile, run one browser session at a time; refer to Chrome profile.

To control what the subagent can do, click Antigravity in the status bar and select Open Settings > Browser (or click More Actions… in the Antigravity panel header > Open Settings, or run Antigravity: Open Settings from the Command Palette):

• Enable Browser Tools: Turns agent browser tools on or off.
• Browser Javascript Execution Policy: Controls whether the /browser subagent asks for review (Request Review, default), runs automatically (Always Proceed), or blocks custom JavaScript (evaluate_script) in the page (Disabled).
• Browser Actuation Rules: Click Edit to configure allowed and denied sites for opening URLs and downloading files; refer to Allowlist and denylist.