The option to enlarge the player does nto work in certain videos after updating to the latest Firefox version. Videos like the one belwo or http://www.youtube.com/watch?v=APsvvo0nyGg&feature=related or http://www.youtube.com/watch?v=yYAu97l06tE&feature=related or http://www.youtube.com/watch?v=4Jk5A3TSKfk&feature=related ad many others. If you start another video and enlarge the player and then go these kidn of videos it will start the video enlarged but you then can't make it small again. The option works for these vieo perfectly in any older version fo Firefox. I don't know what is different on these videos. The option works fine on other videos on youtube. I want to specify that I reinstalled the Flash player. == URL of affected sites == http://www.youtube.com/watch?v=MkNtT6EL8wE