I don't think Gmail Server is offline..
According to me, just to be clear here, you have two issues:
- You're unable to view your Gmail in standard view, only in basic html view.
- You're unable to view Gmail settings page on Firefox.
A few questions:
- When you say "Logging in on a different account (The problems still persist)" - which of the above issues do you mean?
- When you say "Logging in on a different computer (Able to login)" - I'm not sure what you mean "Able to login", because in both of the issues above, you should be able to login to your account.
- What is the error you get when you try to access Gmail in standard view?