It just works.

Does exactly what it says it will do, without issue. Simple.

Easy to use & works flawlessly

nice

Needed a boost for all of the low quality videos. looks like you have a winner. Thank you for your coding magic !!

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!