I did not get the effect I wanted, because this extension does not work with the language learning site Duolingo. It can only work with Facebook, HTML5. That's why my neighbours had to listen to people shouting in Spanish while there were quiet sounds of nature playing in the background. p.s. yes, default volume 100% please, not 10%. Somebody, please, make an extension which can change volume for any tab and any sound source, not only HTML5.

Doesn't do anything on Developer Edition 75.0b10

Cool addon, but please make default volume 100, not 10. Every time i want amplify sound i have to set volume back to 100, its annoying.

отлично прибавляет звук, когда на ноутбуке уже вся громкость на максимуме, теперь нормально смотрю тихие фильмы онлайн, спасибо!

Finally can balance the sound of some broken youtube videos.

Does not work/can't get it to work.

It works according the description. The problem I found is that I couldn´t save the settings I chose and apply them in every webpage; because of that, every time I opened a new tab or reload the same page I had to configure again the extension.

Does exactly what it says it does. Nice simple and effective add on.