firefox 94.0_2,2 no microphone

Hi all,

I've been happily using my headset with firefox for some time now.
Yesterday I updated to firefox 94.0_2,2 and the microphone does not
work anymore.

I normally use https://www.onlinemictest.com/ for testing. In this
case, firefox asks for permission to use the mic on behalf of the web
application and then I select one of the sinks of pulseaudio (number
3, Realtek ALC887 Front Analog) and I'm done. I can use it with the
Zoom web application, GTalk, etc.

But now the microphone seems dead. I installed Chromium and the same
web page works fine.

Might this be related to
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=257639?

Any ideas? I really use this to work :S

Cheers.