Switch to Flash® Player for YouTube™ is a multi-browser (Firefox, Chrome and Opera) addon that forces YouTube website to play all videos in Adobe Flash® Player. In other words, by using this addon, the default player for YouTube will be permanently changed to Adobe Flash®.
This Addon supports both YouTube website and all other YouTube embedded videos hosting on other websites. Based on many studies (please read below) Adobe Flash® player is the best video player for YouTube as it is very lite, powerful and supports many resolutions. By enabling Flash player for YouTube, your browser will consume less CPU and memory.
According to many tech blogs, YouTube is slowly replacing Flash with HTML5 player for its default web player (especially Firefox's latest versions). Therefore, if you still want to use Flash Player for YouTube videos, installing this Addon is the best way to go.
Note 1: Before using this addon, please make sure your Firefox's Flash player is up-to-date.
If you see any Bugs, have a feature request or other suggestions, please fill the Bug report form in this page.