New youtube layout is laggy with Firefox,IE9 and Chrome

I need help. I got BSOD 1-2 times, everyday :devil: I'm not gaming, so i think it's not really stressful, i experienced BSOD while, like web browsing using chrome/firefox, watching youtube videos. I updated my pc using windows update with all the available important updates, but i still got...

Seems like Google is playing games again. I cannot access YouTube at all on the new Firefox (29.1) but no problems with Chrome. In FireFox, I get a blue message box say, "Having Problems?" When I click on it the message says my ISP, CenturyLink, is too slow. I should switch to CableOne. Well,...

Got 27" screen and youtube look like http://i.imgur.com/LjvDeoe.png

this is how youtube is supposed to be: http://cdn.ghacks.net/wp-content/uploads/2012/01/new-youtube-homepage-600x597.jpg this is how it is right now: http://i.imgur.com/qqZ6q.png Almost all of my friends have the old layout, yet me and some others have this new crap. Can I change it?...

I, like many people, don't like the new layout. It's not that it doesn't look nice, I'm just not keen on big updates. They are unexpected and I really don't feel like learning it. I know how to uninstall it on Google Chrome, but how do you do it on Mozilla Firefox?