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
2,468
4
311
3
103
2
78
1
223
Review by Mushi
by Mushi, 2 years ago
Does what it says on the tin! Simple to use but an amazing improvement to browsing and youtube.