doesn't work at all!

Works perfectly - just move 'slider' across - and the result is immediate. Best of all - unlike two others I've tried - this one causes no distortion. Just nice clean sound. I'm using headphones, and Firefox browser.

отлично

This is a great extension that does what it says on the box.

very nice :)

this add on does exactly what it is meant to do, perfect!

nu merge în firefox

genial, eficiente !

Very good help

All volume booster extensions suddenly seem to stop videos from streaming if you change the volume, requiring the page to be reloaded, but if you reload the page, the volume booster resets to 100%.