OK, ever since this rapid release thing came out, Firefox has only been getting worse and had more problems. On Firefox 32, Flash videos start buffering when you skip through the video (e.g. AMVs from Naruto, Sonic X, Bleach, etc.). Others reported buffering at the 0:14 mark. Good thing ytcrschmidt from the Google Product Forums actually reported this to the Firefox developers. Don't force HTML5 for YouTube videos on Firefox 33 or later, but you can still add 240p, 480p, 1080p, 1440p and 2160p to HTML5, just don't force it, fix the buffering problems with Flash instead for this version, so after Firefox 40, you must stop rapid release. Don't tell me to start Firefox in Safe Mode to "test if the problem occurs".