This add on works for equalizing but causes audio bugs. some websites have stopped working, e.g. videos on nyt homepage have no sound.

on youtube it causes volume increases every time you seek to somewhere in the video or skip.

The EQ works but the audio just gets louder and louder over time...

Automately turned up the volume when I pull back the seekbar in bilibili

Inutilisable avec Youtube ! A chaque fois que l'on revient en arrière le son augmente énormément, à la deuxième fois c'est assourdissant. Tout est redevenu normal après désinstallation.

equalizer works but premap have high tendency to broke and i got earrape instead of bass boost (every time i use youtube timeline scrollbar)

Has a bug where as you scroll in the video the audio keeps getting louder and louder :(

Youtube videos would get louder every time I would pause them, or skip around. It took me a clean install and enabling/disabling some addons to find out this was the culprit. Not worth it.

It's difficult to make this thing active, stays inactive despite several reloads, no obvious way to turn it on.

Good idea, but on Firefox 72 it only works on YouTube BUT with a bad side-effect: video speed control won't work!
Furthermore, it ONLY works on YouTube and NOT with Spotify or any other streaming sites.

отключает скорость воспроизведения в ютуб

chrome version works perfectly while Firefox version works only on Youtube but not on sites with embedded videos

Doesn't work for streamable, imgur and several others...