600% Sound Volume by Aliaksandr

4.5 Stars out of 5

2,896 reviews

Rated 5 out of 5
by Ram, 2 years ago
very useful addon
Rated 5 out of 5
by Drosha, 2 years ago
Does what it says
Rated 5 out of 5
by Kirby, 2 years ago
Rated 5 out of 5
by Ben, 2 years ago
Rated 5 out of 5
by FITRI, 2 years ago
Cool. It really boosts the volume on my firefox
Rated 5 out of 5
by max, 2 years ago
Rated 5 out of 5
by Zerosight117, 2 years ago
Rated 5 out of 5
by kasinadhsarma, 2 years ago
Rated 5 out of 5
by Firefox user 18014157, 2 years ago
Rated 5 out of 5
by Thyrex, 2 years ago
Rated 5 out of 5
by SmallFog, 2 years ago
Twitter OK！
Rated 5 out of 5
by arctic, 2 years ago
great extension!
Rated 5 out of 5
by lxce, 2 years ago
Rated 5 out of 5
by Firefox user 15596967, 2 years ago
Rated 5 out of 5
by Vice, 2 years ago
Rated 5 out of 5
by tnfangel, 2 years ago
Rated 5 out of 5
by yeoman88, 2 years ago
Rated 5 out of 5
by Guns&Rozer, 2 years ago
Incredible!
Rated 5 out of 5
by karar, 2 years ago
it's amazing!
Rated 5 out of 5
by Firefox user 18005193, 2 years ago
Rated 5 out of 5
by klozaklun, 2 years ago
Rated 5 out of 5
by wiki tiki, 2 years ago
Rated 5 out of 5
by Firefox user 14239692, 2 years ago
Rated 5 out of 5
by Firefox user 13685598, 2 years ago
Rated 5 out of 5
by TeriL, 2 years ago
Just what I need for many websites. I wished it could be the default volume for all websites