I cannot log into my account with FireFox?

Hi I usually log into my account using FireFox as my browser. But today when I logged on using FireFox as my browser I cannot see anything in my account. My account page is black and there is nothing showing on the page whatsoever? I have tried logging in with google chrome I can see my account - but now I cannot seem to generate videos using Google Chrome? How can I access my account FireFox as my browser like I normally do?