This is great news, all you need a NVIDIA 3D Vision PC or notebooks, while running Firefox 4! Well that could be an issue for you, but hit the Jump to see the Video!
@TatWZA

You have to have a NVIDIA GeForce GPU-equipped machine(Which you can check in your “About” in the settings), sporting driver release 275 or later(also checkable in settings), a 3D Vision monitor(which you probably don’t have), notebook, projector, or DLP HDTV, and Firefox 4(good news is you have that) with streaming HTML5, OH and a pair of active shutter 3D glasses(which you prob don’t have those either)
I tried on a macbook and a pair of Real 3D glasses you get in the movies, and it didn’t work -_- So you def need all of those things, then your in the 3D from Youtube business!!
Watch this Video to try it for yourself!!