This add-on does exactly what it says it does, nothing more, nothing less. Youtube would always turn the autoplay next video feature back on whenever I would go to another video, which was quite annoying. I never want the autoplay slider on, and, with this add-on, I don't have to worry about it any more. Also, playlists still automatically play the video, in case you were wondering.

My thanks to the developer! This add-on definitely improves my Youtube experience.