cant remove it ?

pretty good
works in even obscure sites

Excellent add-on for anyone whose volume is too low. Works very very well. Also, as an added feature you can quickly see which tabs are playing audio. Much thanks to the developer!

(I would consider renaming it, the name is a bit intimidating, looks like a maths formula.)

it work good but there is some problems need to fix for example
1- when adjust the sound the video stops and you need to play again or it's start from the beginning
2- for some website when i adjust the sound the video stop working and it give me error said ( no video with supported format and MIME type found) i cant post a screen shot her but this is the website you can try it https://watchpeopledie.tv/post/118905

It works. Not a magic bullet , but helps a lot to level up volume on many youtube videos.