This problem appears to have been around for years. However, I have never experienced it. I installed Firefox 105.0.1 (64-bit) on 2022-09-24 and since then I have been experiencing it. The PC freezes and the only solution is a reset. When I check the logs I find: Warnings like this: The Desktop Window Manager process has exited. (Process exit code: 0xe0464645, Restart count: 4, Primary display device ID: NVIDIA GeForce GTX 1080) Errors like this: Faulting application name: dwm.exe, version: 10.0.19041.746, time stamp: 0x6be51595 Faulting module name: KERNELBASE.dll, version: 10.0.19041.1949, time stamp: 0xcb12e58e Exception code: 0xe0464645 Fault offset: 0x000000000010fb62 Faulting process ID: 0x3ec Faulting application start time: 0x01d8d750b416ff93 Faulting application path: C:\WINDOWS\system32\dwm.exe Faulting module path: C:\WINDOWS\System32\KERNELBASE.dll Report ID: 4327992c-3041-41e6-b68a-127d0cf53bc8 Faulting package full name: Faulting package-relative application ID: A couple of days ago I installed version 105.0 (64-bit) and the problem hasn't occurred yet. So, I conclude the problem is with version 105.1.