To use these add-ons, you'll need to download Firefox.

Log in
Add-on icon

Reviews for 600% Sound Volume

600% Sound Volume by Aliaksandr

4.5 Stars out of 5
5
2,473
4
312
3
103
2
78
1
223
Review by Firefox user 16022017
by Firefox user 16022017, 3 years ago
Recent Update seems to have broken the ability to watch a lot of videos.