Good job

Great add-on. Some films on streaming format were just too low volume to watch on my laptop. 600% Sound Volume was a game changer and made streaming videos a real pleasure.

This is definitely the only such add-on that does what I want it to do. Thank you, Aliaksandr!

I love this and it works nice! One minor problem though: on Youtube, when I use it, videos will only play on 1x speed, neither faster nor slower work anymore. (2021) ... Three years later (2024), I still use it on a daily. Greatly recommended.

Great! Just great!

best volume booster out there , used something on every browser , but the combined force of firefox and you made it good , before I had to plug in so that the audio does not distort , but here it's perfect either way

Update: It now works exactly how I hoped, and I can change the speed of videos and it works. Changed my rating from 4/5 to 5/5

Amazing add-on. I use it all of the time. Recently it won't let me speed up YouTube videos while I have this add-on enabled which kinda sucks. Before it would just not let me speed it up if this add-on was in use, but now I have to fully disable it from Firefox to speed up the videos.

Works great except for the past week, it's caused twitch clips to not load.

Edit: Addon is fixed and works great.

This app really works unlike a lot of other app simple to use unlike other apps.

Very good add-on, does what it says it does. great extension

Edit: Issue seems to be fixed, thank you!

This has broken clips on Twitch.tv for some reason. I will change my rating if this is fixed!