> Given that Teams doesn't work in anything other than Chrome

That's news to me; I use Teams on Firefox every work day and I see no issues (other than it being one of the very few sites which need third-party cookies to work, but recently Firefox has made it easier to add an exception for a single site like Teams).

I used to use Teams w/ Firefox but the lagging and other issues with video calls led me to using Chrome. Is that still an issue?