Re: "no problem giving Apple a pass" - One major difference
"Windows is not mandatory anymore"
Can you please tell that to my employer?
You seem to misunderstand - there is still choice here - just that your employer (who has the right) has taken it for you. They have a choice what browser you use during work time and you have a choice whether or not you work there.
If your employer bought Apple hardware then your employer loses their choice of browser - but you can still walk out - which I would do if my employer switched to Apple.