This current update (129.0) crashed my windows 10 pc. Firefox showed that the update was completed and restarted itself. Nvidia downloaded a driver update & attempted to install it but failed. The error msg indicated that another app update was in progress, prevented it from installing, and to try later. Based on what I saw on Task Manager, Firefox locked up the windows installer module and had 100% disk usage. PC then crashed and looped several times trying to auto-repair itself. Had to do a hard power down, a safe boot, and the restore PC and Windows 10 to last good version. Will not do any Firefox updates until this problem is resolved.