Why Facebook Video Calling Is Not Working in Opera?

With all the hype out now on Facebook video calling, people are trying every way they can to get the new video chat feature up and running.

One major problem though, Facebook video calling doesn’t work in the Opera browser.

The only browsers that Facebook specified were compatible with Facebook video calling are Firefox, Chrome, Safari, and Internet Explorer.

However, if it were up to me, I would have excluded Internet Explorer as well.

So now the question I have is, why was Opera excluded from Facebook’s list for being compatible with Facebook video calling?