Hello itsjustme,
We are not aware of any difficulties with the site that would prevent you from accessing it using Firefox, so it is unclear what may be occurring for you when you try. I suggest that you first try clearing the Firefox cache to see if that changes the behavior when you try to access the site or your account.
If you continue to run into difficulty, please provide the details of what you are experiencing and if the behavior changes any when you clear your browser cache, please also include those details so we can look into this further.
- Craig