Mozilla has started rolling out Firefox 86.0.1 to address a known bug causing the web browser to crash frequently when launched on Linux systems. Linux users have started seeing more and more crashes after updating to Firefox 86 last month. Mozilla also added supercookie protection to Firefox 85 to block hidden trackers from monitoring users while browsing the web. Other known issues addressed in this version include bugs causing windows to lose or gain focus unexpectedly and “unexpected behavior with extensions managing tab groups”” You can download the browser installer from the official release directory.”
Source: https://www.bleepingcomputer.com/news/software/new-firefox-version-fixes-linux-crashes-apple-silicon-hangs/