Great add-on.
I just hope to make it fixed for all websites, or at least, for browsing session.

Da kostenlos , super ! Macht was es soll, Danke.

The app really does boost the volume, which I needed, so I'm happy about that. I just wish it would keep the volume the same from site to site. Every time I go to a new channel or website, I have to re-set the volume level. Any way to keep the setting??
Edit 7/28/2022 - What is going on with this app? I have to re-set it at least 50 times a day now. It goes off by itself; it goes off when I change tabs; it does off when I change streaming channels. And I've had a lot of crashes lately - can't totally tie it to this app, but it's suspicious. I keep using because I need the volume boost, but it's getting very annoying.

It has been a great help with listening to videos that have really low volume. Works really well. A big Thank you for making this :)

Thank you!! YouTube is always too quiet without this addon...

1. The tool is extremely straightforward and simple to use.
2. It does exactly as it said, just pump the volume boost as much as you need and those videos you really want to watch without headphones but are low on volume, suddenly become loud enough that you can double task or w.e it is you were planning that required a boost.