Firefox temporarily locks up when opening Youtube links, and the player is all messed up.
When opening youtube links from anyway(IM, google, reddit etc), Youtube will hang for a few seconds, and show up black(http://i.imgur.com/oKkqy.png).
This only started happening recently and I hadn't done anything to either flash or firefox.
Alle antwurden (1)
Found out it was some HTML5 trial that I was automatically forced into on Youtube. Opting out fixed it.