[Assist] No audio in IceWeasel when joining BigBlueButton conference

[bill-auger]

it is probably a general webrtc issue - there is an open bug
report on the bug tracker now[1], about the same problem with
jitsi-meet

iceweasel v76 is in the pipeline now - it has a fix for webrtc[2]
- please do write back if iceweasel v76 has the same problem


[1]: https://labs.parabola.nu/issues/2767
[2]: https://lists.parabola.nu/pipermail/dev/2020-May/007745.html