v0.21.1

vercel-labs/agent-browserv0.21.1Mar 18, 2026by github-actions[bot]

AI Summary

Patch release adds network traffic capture in HAR 1.2 format and a built-in self-update command.

Key Highlights

Added commands to capture and export network traffic in HAR 1.2 format.
Added 'agent-browser upgrade' for automatic self-updating via npm, Homebrew, or Cargo.

New Features

HAR 1.2 network capture
Built-in upgrade command

Full Release Notes

### Patch Changes

-   1e7619d: ### New Features

    -   **HAR 1.2 network capture** - Added commands to capture and export network traffic in HAR 1.2 format, including accurate request/response timing, headers, body sizes, and resource types sourced from Chrome DevTools Protocol events (#864)
    -   **Built-in `upgrade` command** - Added `agent-browser upgrade` to self-update the CLI; automatically detects your installation method (npm, Homebrew, or Cargo) and runs the appropriate update command (#898)

    ### Documentation

    -   Added `upgrade` command to the README command reference and installation guide
    -   Added a dedicated **Updating** section to the README with usage instructions for `agent-browser upgrade`