Kudos for at least trying to address this, MS should hang their head in shame, this is not the hardest problem to solve these days. If we could do it in 1995 they should be able to do it 30 years later.
Office 365 actually works better in Firefox in Linux than any other browser in Windows. It's like they've kind of given up on the whole OS thing, and have just decided to go with Linux.
On my fairly ancient Core i7-8700 I can have a video call open in one screen and be editing in Resolve on another.
And half of the time it crashes. Or the video/audio doesn't work.