Ugh, couldn't make Librewolf tonight to sound right, this is what I listened to on Peertube.
Turns out it's a well known problem with wrong audio sampling: https://codeberg.org/librewolf/issues/issues/625 and https://forum.manjaro.org/t/audio-issues-on-librewolf/130197
I've tried to turn off FRP, turn it on only to turn back off, whitelist Peertube domain, but with no avail. Guess I'll move back to Firefox for now