Cant Play on Firefox?

I logged in one time to a mule and then it got stuck at the loading screen. So know whenever I try to play on firefox I cant get to the menu to log off my mule. I think it they might have banned the profile. So pretty much whenever I try to play on firefox I cant get to the menu, so does anyone know a way to kinda refresh the page where it deletes data like that. Maybe in the settings?

Right Click, go to Settings, choose the middle bar and there should be a slider. Bring it all the way back and it should ask you if you wish to remove all the data from realmofthemadgod.com . Press ok, and then refresh the page. It should ask you if wish to increase the amount of data storage for realmofthemadgod.com . Then you should be able to log in.