Yeah, I told Firefox that it's okay, trust this one, and it put it on the exception list. But nothing shows up. Let me try IE...
Oddly enough, Firefox didn't have me actually log in. IE asked that I log into Battlenet and enter my authenticator. Oddly enough, after I did that, Firefox suddenly looked like it was working better. They must be eating the same cookie.
IE.png
Huh - I hit F5 to refresh it and now it's working. BIZARRE! In fact, whenever I hit any tab, it shows me a blank screen until I hit the refresh button.