It does what it says

it's good

I occasionally use it to boost sound, but for me the main use is to play music in one tab at 10 or 20% while I might have some podcast going at 100% in another tab.

good job

Ich liebe es....

Very nice and handy

Great add-on. Does what it says. And it has added a feature to combat it's greatest flaw, which is that on certain websites the extension has to be refreshed to do it's job.