v0.20.1

vercel-labs/agent-browserv0.20.1Mar 14, 2026by github-actions[bot]

AI Summary

Patch fixes compatibility with Lightpanda engine by accepting integer IDs, clarifies SIGPIPE behavior, and fixes WebM recording output to use the VP9 codec.

Key Highlights

AX tree deserialization fix for Lightpanda compatibility
WebM recording output now uses VP9 codec
Fixed Chrome temp-dir cleanup test on Windows

Full Release Notes

### Patch Changes

-   bd05917: ### Bug Fixes

    -   Fixed **AX tree deserialization** to accept integer `nodeId` and `childIds` values for compatibility with Lightpanda, which sends numeric IDs where Chrome sends strings (#775)
    -   Fixed **misleading SIGPIPE comment** to accurately describe the default Rust SIGPIPE behavior and why it is reset to `SIG_DFL` (#776)
    -   Fixed **WebM recording output** to use the VP9 codec (`libvpx-vp9`) instead of H.264, producing valid WebM files; also adds a padding filter to ensure even frame dimensions (#779)