I have to flip between Chrome and Firefox depending on which bugs in which product I need to avoid :-)
My favourite one is a bug in Flow where you paste a string and the entire UI goes in to an error state (can't even save) so you have to reload and lose any existing changes.
Pretty much this. Use MS Power platform exclusively for reading/writing from MS things and you should be OK. Venture beyond that and it's painful.
A lot of stuff seems to have grown out of (or is just layered upon) Sharepoint and Dynamics, so there is a lot of synergy there.