v0.38.2

vercel-labs/agent-browserv0.38.2Oct 1, 2026by github-actions[bot]

Upgrading?

AI Summary

This release focuses on critical stability fixes for browser automation, including improvements to Chrome launch behavior and shared memory handling. It also introduces new configuration options for kernel profiles and upgrades the underlying eve integration.

Key Highlights

  • Fixed Chrome freezing by draining stderr during browser lifetime.
  • Switched Browser Use to Cloud V4 for better timeout management.
  • Added `KERNEL_PROFILE_SAVE_CHANGES` environment variable.
  • Fixed chat mode to properly support `webmcp` and `skills` commands.
  • Upgraded eve integration to version 0.57.0.

New Features

  • Added `KERNEL_PROFILE_SAVE_CHANGES` environment variable to opt into saving kernel profile changes.
  • Fixed chat mode to allow `webmcp` and `skills` commands to function correctly.

Full Release Notes

### Bug Fixes

- Fixed **auth vault login** to pick usable controls when hidden duplicates exist, and to bind credential entry to the selected field so replaced fields or redirected focus are rejected before submitting (#2014)
- Fixed **chat mode** to allow `webmcp`, `skills`, and other top-level browser commands, so the model uses page WebMCP tools instead of falling back to `eval` (#2015)
- Fixed **Kernel profiles** so `KERNEL_PROFILE_NAME` sessions send the profile as an object instead of failing with a 400, and added `KERNEL_PROFILE_SAVE_CHANGES` to opt into saving changes back (#2004)
- Fixed **Chrome freezing after launch** by draining its stderr for the browser's lifetime, so a full log pipe no longer blocks the browser (#2003)
- Fixed **Browser Use** by switching to Cloud V4, which creates, attaches to, and stops the same browser with bounded timeouts (#1879)
- Fixed **Vercel Sandbox shared memory detection** by measuring `/dev/shm` capacity and adding `--disable-dev-shm-usage` below 256 MiB, so Chrome no longer terminates renderers on the undersized mount (#1890)

### Improvements

- Upgraded the **eve integration** from eve 0.47.3 to 0.57.0, so apps on eve 0.50 and later build again (#1945)

### Documentation

- Updated the **contact sheet example** with the loading-flash demo output (#1871)

### Contributors

- @Railly
- @benjamincanac
- @boatri
- @luxleader
- @petehunt
- @robertjamesprior
- @simonellefsen
- @zyz619963502zyz

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