So because of non-standard DRMed content, you decided that the best way of preventing that to be a problem in the future is to install the only non-standard browser which renders this non-standard DRMed content from the same provider?

Would you even considered that if that one provider was anyone but Google? No? If so, why do you give Google a free pass?

It just said "cannot play video", did not inspect why because it said something about a plugin, and it made me annoyed, so I switched. This page http://www.youtube.com/html5 had only 2/6 checkmarks in FF.