Jitsi doesn't use AudioWorklet as of now (and doesn't need to).

We're continuing the work so that jitsi works well in Firefox, there are a few things remaining, but less so than a few weeks back (I'm more on the audio side, and those issues are mostly signaling or networking related).

As an outsider that has done some reading, I believe the biggest thing it still needs is simulcast support, and https://bugzilla.mozilla.org/show_bug.cgi?id=1210175 tracks that for H.264 (https://bugzilla.mozilla.org/show_bug.cgi?id=simulcast is barebones, 1210175 is more interesting). That should be part of the https://bugzilla.mozilla.org/show_bug.cgi?id=1607238 match-WebRTC-spec-updates work. Short story seems to be “nothing is happening at this time”.

Indications are "likely yes", given this issue on Jitsi Meet's tracker with lots of Firefox 76 discussion and bug links in it:

https://github.com/jitsi/jitsi-meet/issues/4758