[Bug] Browser Subagent fails on Linux - Playwright 1.57.0 driver download returns 404

Google Antigravity
1

Environment

OS: Parrot OS (Debian-based)
Antigravity Version: 1.107.0
Architecture: x64

Chromium:
Chromium 150.0.7871.124

Issue

Browser Subagent cannot start.

The browser never opens.

The error occurs before Chromium launches.

Error

failed to create browser context:
failed to install playwright:
could not install driver:

404 Not Found

https://playwright.azureedge.net/builds/driver/playwright-1.57.0-linux.zip

Fallback URLs also fail:

https://playwright-akamai.azureedge.net/builds/driver/playwright-1.57.0-linux.zip

https://playwright-verizon.azureedge.net/builds/driver/playwright-1.57.0-linux.zip

Steps to Reproduce

  1. Open Antigravity IDE
  2. Ask the agent to open any website
  3. Browser Subagent starts
  4. Browser never opens
  5. Playwright installation fails with 404

What I tried

  • Reinstalled Chromium
  • Cleared Antigravity cache
  • Reinstalled Antigravity
  • Verified HOME environment variable
  • Chromium launches normally outside Antigravity

Expected Behavior

Browser Subagent should launch Chromium and create a browser context.

Actual Behavior

Playwright attempts to download driver version 1.57.0 from Azure CDN.
All three mirror URLs return HTTP 404.
Browser context creation fails.

This appears to be an issue with the Browser Subagent requesting an unavailable Playwright driver rather than a Chromium or Linux configuration problem.

2

I have the same issue using Antigravity IDE in WSL2 Ubuntu on Windows 11.

Antigravity IDE Version: 2.1.1
VSCode OSS Version: 1.107.0 (user setup)
Commit: e0b7a2bcf575cfba10528c4e7c10bd3ce2d7769a
Date: 2026-06-17T22:39:43.962Z
Electron: 39.2.3
Chromium: 142.0.7444.175
Node.js: 22.21.1
V8: 14.2.231.21-electron.0
OS: Windows_NT x64 10.0.26200
Language Server CL: 933924006

Problem Description & Logs

When invoking the browser_subagent or open_browser_url tools, browser context initialization fails consistently across attempts with a 404 Not Found error when attempting to fetch the Playwright driver binary.

**Exact Error Log:

```text**
failed to create browser context: failed to run playwright manager: failed to install playwright: could not install driver: could not install driver: error: got non 200 status code: 404 (404 Not Found) from https://playwright.azureedge.net/builds/driver/playwright-1.57.0-linux.zip
```

Technical Root Cause Analysis

  1. Deprecated Driver CDN Structure: Microsoft Playwright deprecated the legacy driver URL pattern (https://playwright.azureedge.net/builds/driver/playwright-*.zip). Older versions of playwright-go (or hardcoded driver fetchers targeting Playwright version 1.57.0) hit a HTTP 404 error on Azure Edge, Akamai, and Verizon mirrors.
  2. Host Environment Isolation: Attempting to manually install system-level Playwright binaries or browsers on the host OS does not resolve the issue, as browser_subagent runs within an isolated container environment that attempts a fresh download of driver version 1.57.0 via the deprecated CDN endpoint.

Suggested Fix

Update the underlying playwright-go / Playwright SDK dependency in the Antigravity IDE runtime to a version that uses the updated Playwright release endpoints, or bundle the driver binary directly within the subagent image environment to avoid dynamic CDN fetching.