Rated 1 out of 5 stars
With this add on YouTube videos will actually buffer and you can rewind the video without the buffer being deleted. Only issue is that it COMPLETELY BREAKS YOUTUBE, YOU MUST REFRESH THE PAGE TWICE TO WATCH ANOTHER VIDEO, first refresh on the page you clicked the video on, then again on the video page as you get the error occurred message in the player with static in the background, if you don't follow these steps the last video you watch will not unload and will play on any page on YouTube. Tested on Pale Moon x64
Update: It's crap, disabled for now.