Hi there @SPython,
I am sorry to hear you have been experiencing problems while attempting to access AT&T’s website from your Firefox browser. It is a very popular choice among users, so I completely understand your concern.
I’d love to gather some additional information about the errors you’ve noticed and do our best to help get them addressed. I will be sending you a private message to your forums inbox. You can check the envelope icon in the top right of your screen for my message.
I hope to hear from you soon, and thanks for bringing this to my attention!
Brett, AT&T Community Specialist