I believe Firefox issues in Jitsi were a problem before but are sorted out now.
https://github.com/jitsi/jitsi-meet/issues/4758#issuecomment...
https://github.com/jitsi/jitsi-meet/issues/4758#issuecomment...
It's not my fault that Mozilla is a shitty company that makes a shitty browser and that every other company that used to make a browser is now skinning Chromium. I just live in this world, I didn't make it.
You want better Firefox support? Put up or shut up. It's open source.