I always using extension like this, because I also use this on chrome 5 stars ofcourse..
although extension that similar on chrome is detected have a virus I glad this is save and working perfectly~

Edit: Don't have issue but wanna request can you make button for the extension like.. 600% and 0% because I don't wanna scroll it every time I watching on youtube..

Makes watching movies and YT vids on your laptop much easier without speakers. It boosts that volume and it's super easy to use!

Works as advertised. Would love if there was a way to set the default volume to 600%, rather than having to set it each time.

Excellent, thank you very much Aliaksandr!

works very well, it actually boosts sound

this is just what I need to hear lots of videos online. thank you.

nice

Perfect!! It works flawlessly.

Свою задачу выполняет. Поставил, чтобы увеличить звук на ютубе. Простое управление.

An excellent audio control using Firefox while on a Mac computer.

I can finally blast DnB home alone.