So it sounds like Facetime's Firefox support is better in your experience?
FaceTime is limited to Apple devices until iOS 15 allows anyone with a browser to join a call, so you’d think they’d be emphasizing the benefits of portability more.
https://www.theverge.com/2021/6/7/22522889/apple-facetime-an...
It was originally announced as an open standard, though. Anyone who remembers Steve Jobs would have caught on. It is easy for us old-timers to forget how long ago that was now, so I extend my apologies to the youngsters.