The new features and improvements implemented in the Firefox 92 web browser include the ability to automatically perform HTTPS upgrades when HTTPS RR is available (using HTTPS RR as Alt-Svc headers), updated bookmark toolbar menus to follow Firefox’s visual styles, and redesigned certificate error pages for a better user experience.
In addition, this release promised an improved Firefox PDF viewer with support for filling more forms, such as XFA-based forms used by various governments and banks, during the beta phase, so this might be available in the final release as well.