Nope.
1. Latest windows 10 20H2 with latest cummulative update installed yesterday
2. Ran system file checker AND ran dism restore health too
3. It is to the latest update AND it isn't about Firefox it's about (probably) windows being at fault
- I have a restore point which is around 5 days old and in it too I had the same problem :/
Commands I ran:
sfc /scannow
DISM.exe /online /cleanup-image /Restorehealth
<Reboot>
sfc /scannow
And all the corrupt files were gone and the problem was still there
I think it's windows 10 20H2 because after I updated this problem came