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 !