Perfecto

really helpful to hear small audio send by teachers on you're online class

Never found a site it doesn't work with, unlike other volume booster extensions I've used with Firefox. Works on a tab by tab basis, which is also really useful.

Cumpre o que promete.

It's great but i would like to have even an higher volume

It would be nice if the app can work with Playback speed on YouTube.

easy and works perfectly

Excellent work and easy

It's a great add-on, I only wish it worked on the Spotify Web Player

Does exactly what it says it does. For free. And it works well. Amazing. 10/5 stars.

Best sound extension I've found