(edited)
9-28-22 currently a bit buggy(youtube might be fighting it[although it works on chrome]{many videos have disabled by owner on the dislike count) but when it works it is better than the oringal dislike feature

Essential addon

Every time i click off a video i have to reset it to show it again.. and then i have to refresh the page AGAIN. It just doesnt work for me

been 4 days, not working at all. its very buggy, sometimes it shows dislikes but the text and likes are so wrong. sometimes dislikes dont show at all and sometimes dislikes dont update. when clicking on another video it shows dislikes of the previous video on the new one. very buggy and broken

When it stops working, try re-installing the add-on.

If it isn't working, *READ* the help. Uninstall and re-install. Now it works again. YouTube could easily block, don't blame the author of this add-on if it doesn't work for you.

I literally made a Firefox account just to give this extension five stars. THANK YOU DMITRY
EDIT: If it's currently broken for you, it might be because of YouTube's new UI they're rolling out. I downloaded the Enhancer for YouTube add-on and it now works again.