I assume any compatibility issues with Chromium will soon disappear given Edge's migration to being Chromium based but how well do the web versions work with Firefox?
My workstation that I use almost exclusively is Mint. I am one of those people who are, to put it politely, not keen on Google's ad and data sponge tentacles in every last item on the planet, and so I use Firefox as my primary browser.
O365 has yet to show me many problems with the O365 suite. The only problem I do have is a complete and utter lack of desktop notifications. I'm late to meetings a lot. For someone who values punctuality, it's a major flaw in my view.
We also use Teams a lot, and there the Firefox + Linux story is significantly worse. You lose all teleconference capabilities - and that's true for Chrome or Chromium as well. The chat functionality is acceptable and weirdly, the notifications on Teams work without any problems. Someone on that team needs to show the O365 team how to do it.
I have a VM for when I absolutely have to do something in Windows. For everything else, there's ~~mastercard~~ linux.
I put all notifications on my mobile device, it works well. A web app should be able to send OS notifications however, e.g. slack does on my copy of Ubuntu. Believe I had to enable permission once.
That's a good idea; it probably wouldn't matter for me since my phone is muted all day long and I only use my phone if I'm on a coffee quest, but most people are a lot more attached to their phones than I am
Postgres has been working on Windows forever, I used it from 2007 or so.
Also, my Ubuntu Mate has been working flawlessly on the desktop for 5 years, 10+ if you count the gnome2 days. No privacy invasion or helpful ads either.