After installing this add-on, videos stopped playing on the VOD service I use. The videos wouldn't load at all. When I switched to a different volume-boosting add-on, the problem went away, so it doesn't seem to be an issue with the volume adjustment itself—it appears to be a problem specific to this add-on. I confirmed this by repeatedly uninstalling and reinstalling the two add-ons alternately several times.

Mutes Bandcamp audio when adjusting at all

1). It doesn't go up from 100%
2). I was adjusting it with the scroll, very easy to use, now that doesn't work either. Windows 11 25H2 Updated.
WaterFox 6.6.10 And Firefox 149.0

It seems It could be both Twitch and YouTube that aren't working with it properly, where going from 100% to 120% sounds like going to 200% instead. 1fexd version defiantly still increments up less at each 10%