Dislikes count extention
Alternative doesn't work for me. Trailer https://www.youtube.com/watch?v=aEx_CBxNrXY
https://www.mrfdev.com/enhancer-for-youtube
On December 14th, 2021, YouTube has completely removed the code this extension was using to bring back the dislikes count.
As an alternative you can try out Return YouTube Dislike, both extensions are compatible. https://returnyoutubedislike.com/install