Easy to use, does exactly what it says.

Very nice and useful. I like how they've improving it. If only the speaker icon was more visible, because it's grey and since I use FF with dark them, I can barely see it.

Работает! Было бы неплохо, если бы настройка сохранялась не на определенную вкладку, а навсегда :)

Lo he usado durante muchos meses y está genial, sugeriría añadir atajos u cosas para personalizar o comprimir la pequeña interfaz,

Es wird kaum lauter. Das sind keine 600% sondern eher 20%.

Best volume booster, ALWAYS works.

Does exactly what it says. Wish it had a dark backdrop option, but that's the only nitpick I can think of.

Easiest and best looking addon for volume multiplier