still has a long way to go compared to the chromium version.
it made google meet completely unusable, weighted heavily on youtube and many other video websites when it didn't break them. most of the times doubles the speaker audio in an echo-like manner, so you can't really make out anything out of whatever audio gets butchered by it. i thought it was something with firefox and almost switched browsers before realising this was the culprit.
that being said, the chromium version has been working really well, I love its functionality and hope this one is by the same developers, but the firefox version is still very crude. I will be waiting further developments and hope it can become stable soon.

The best of all firefox's pitch shifter programs