[montroser]

It's crazy that they still detect Firefox user agents and deliver the old ultra-basic call experience, where half the time you can't see the same thing that everyone else is seeing. When content is "spotlighted" or when there's a bot or app installed in the call, Firefox people just can't see it, and there's not even any messaging saying as much.

Of course if you spoof your user agent to be Chrome or Edge, all works perfectly well. I would bet Microsoft have ended up here out of ignorance more than malice, but either way it's not very nice of them.