WordPress 4.3 Beta 3 主要更新如下：
- Performance improvements for Menus in the Customizer, as well as bug fixes and visual enhancements.
- Added Site Icon to the Customizer. The feature is now complete and requires lots of testing. Please help us ensure the site icon feature works well in both Settings and the Customizer.
- The improvements to Passwords have been added to the installation flow. When installing and setting up WordPress, a strong password will be suggested to site administrators. Please test and let us know if you encounter issues.
- Improved accessibility of comments and media list tables. If you use a screen reader, please let us know if you encounter any issues.
- Lots and lots of code documentation improvements.
- Various other bug fixes. We’ve made more than 140 changes in the last week.