It seemed to work okay for the last EuroFilk. I'm pretty sure there were fewer people, and I'm also pretty sure more of them had used it before. The no-host UI means that a stray click can cause havoc, and you get race conditions with the host and the next singer trying to unmute and having it cancel out. I believe there was an update since RainbowCouch that made it work better on Firefox.

That said, Zoom still appears to be more stable, and it's fun to play with backgrounds. Jitsi is still better if you want long meetings and don't want to shell out $14/month/host.