Excelente herramienta, en particular para quienes como yo, tenemos cierta deficiencia auditiva, podría mejorarse si se activara en un solo paso, es decir no tener que aumentar el volumen en cada pestaña sino hacerlo en automático en todas. Felicidades al creador de éste buen add ons.

Das "Sound Volume" Addon funktioniert richtig gut.

Good job , increase volume

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.