I agree with your assessment of all of the Windows versions. I also stayed on Windows 7 until MS support ceased and then moved on to Windows 10 kicking and screaming. Now, after having used it for 3 years, I think it's the best Windows version ever. Windows 11 is just still Win10 with just a different graphical interface mainly. There's nothing Win11 can do that Win10 cannot do, so no reason to upgrade to it. Windows 10 support runs until Oct 2025 so it will be good for another 3 1/2 years at least. Now there are rumors of a Windows 12 (probably a fix for Win11).As far as I could tell, Windows 8/8.1 was just a silly experiment that went wrong, a bit like Vista and ME.
XP was great, in its day, I ran that until it was just silly not to upgrade to 7 and was very impressed. after that, as always, waited until I was forced to upgrade to 10 and never looked back, it was like 7 but with all the flaws ironed out, still works brilliantly.
Windows 11, imho was launched for the idiot part of society, the ones that have to get the latest thing simply because it is the latest thing, regardless of whether it has been tried and tested or not.
Having said that, present company excepted, quite a few of my colleages here at TSF are running 11 and, from what I can gather, they've hardly noticed a difference.
On a side note, here in the forums, I think you could get your point across quite adequately without being disrespectful to the staff. As you rightly mentioned earlier, we are all volunteers and we are all human. Humans are well known for having good days and bad days, perhaps you should consider that before you press the 'Post' button.
Regarding Firefox, I have used it since Internet Explorer 6 days. It has always worked great for me, even though Google Chrome is much more popular. Firefox still is open source and one of the few browsers not going with the crowd and using chromium as it's engine. I run the latest version of Firefox and I do not experience the issue with running full screen. When I move my cursor to the top of the screen the buttons all appear to across the top normally.