Recently, the extension has been acting up on Firefox, constantly throwing the `NS_ERROR_DOM_MEDIA_METADATA_ERR` error. There's nothing wrong with the base64 audio being received, I verified that. Somehow it's triggering an old bug in Firefox I think, mentioned in this StackOverflow post: httpsstackoverflowcom/questions/44200990/html5-audio-player-in-firefox-is-not-working

EDIT: I found the issue. It was me. I diff'd my prefsjs file with a default one. Found out a sus config I don't remember changing. media.ffvpx.enabled was set to false. Setting it to true again fixed it. I am not sure why, maybe the decoding logic lives there..?