I've used plenty of these types of volume booster add-ons and this one is the best one I've used.

Does exactly what it says. This is what I needed for the most. Thank you.

It is a really helpful add-on. Some YouTube videos are really quiet even at full volume, so this add-on comes in handy in these situations.

Perfect to use with youtube music or any other web based music player.

recommend it

very ok - don't know if the add-on remembers a site or if it's possible - but very well already

Great Extension. If you could add global boost feature, to enable me to boost volume for all open tabs.

Only one that works. Just install!

Does its job. Lots of keyboard shortcuts.