i insstalled windows 11 but firefox claims 100

A Firefox 147.0.2 UserAgent on Windows 10 and 11 is Mozilla/5.0 (Windows '''NT 10.0'''; Win64; x64; rv:147.0) Gecko/20100101 Firefox/147.0 Windows 11 is basically based on the same '''NT 10.0''' as Windows 10. https://en.wikipedia.org/wiki/Windows_NT#Releases Perhaps when Microsoft actually makes a new version of Windows it will be based on a new NT to prevent this sort of thing.