The change log has the details of what's new in the beta update, which brings the version number up to 188.8.131.52:
- Localization Fixes
- Fixes related to viewing sticker comments
- Fixes related to feed resiliency and navigation
- UI fixes related to issues with light theme
- General bug fixes
- Performance improvements
Let us know your impressions of this latest Facebook beta release in the comments! Thanks the many folks who tipped us!