У вашего броузера проблема в совместимости с HTML5
Simple device meant to teleport like a boss.
Tutorial:
http://www.youtube.com/watch?v=woxkY_kJj2w
The Teleportation Spell was invented by Sethbling:
http://www.youtube.com/watch?v=Mm9rH7fdP00
Panda4994's device (that guy who gave us endermen farms):
http://www.youtube.com/watch?v=xuckDRzPp3Y