This might have been interesting if it had any detail at all. However, as it is right now, it's more of a "Haha, Firefox - you're not perfect!" type thing. I think I will check out what the vulnerability was after they actually post it though, so this thread was not for nothing!
Maybe. But they're telling you why they don't publish the details pre-patch, and it's a valid reason, IMO. In the meantime, it's good to know that the browser has a serious flaw.