Stupid Question - I went directly to mynortonaccount.com and tried to login, but I was unable. I thought maybe I was screwing up my password.
So I looked at my settings in Firefox and saw that I was currently blocking third party cookies. I enabled third party cookies to see if that mattered and was then able to login to my account.
Can this be true? Why would Symantec require third party cookies? Those are usually trackers (bad!).