Opened the link in Firefox and got a message "...use chrome". I find that not only unacceptable, but also bad practice.

Are you on android? Android phones don't allow WebRTC video chat to work on any browser except chrome, so it's unfortunately out of our control :( we support FF on web though!

Can you expand more on "Android phones don't allow WebRTC video chat to work on any browser except Chrome?"

My brief research[0] would indicate that WebRTC is indeed supported on FF Mobile and has been supported since 2013[1].

[0]: https://caniuse.com/?search=webrtc

[1]: https://blog.mozilla.org/blog/2013/09/17/webrtc-now-availabl...

Firefox dropped H264 support 1 year ago because of Google Play Store policies. This codec was required for interacting with iOS devices which did not have VP8. However, VP8 has been added since iOS 12.1, so it might be possible to use it now across all platforms.

- https://bugzilla.mozilla.org/show_bug.cgi?id=1548679

- https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/Rel...

While Firefox had to drop support for OpenH264 on Android, because of Google's Play Store policies. It is not true that only Chrome supports H264 on Android. Firefox switched to the Android platform encoder and decoder. So H264 work fine in recent versions of Firefox.

I like this, as it keeps the background the same and only moves the person. I find it less dizzying as such.