It works 1 time every 2, but there is a chance that microphone for example doesn't work, and I was tired of taking my chances, or having to install chrome on linux, so I just now have a VM that when I need teams, I can boot and then shut down and forget about it

Teams loads super slowly or not at all these days as of this morning in Firefox. The page frequently blanks and repaints.

It also requires adding 7 microsoft sites to the 3rd party cookie exception list that are totally necessary and not for spying on users.

Microsoft has never fundamentally changed, they just got smarter and are playing a longer game now.