Norton Internet Security - Editing Access Rules

[Butter side-up]

Does anybody know how to edit the rules that Norton Internet Security uses to allow access to the internet?

I upgraded a version of Firefox - and when I first used it - Norton suggested blocking all access to the internt by the main program - firefox.exe.

Being tired (my excuse) I accepted this suggestion - and of course now Firefox cannot access the internet.

Where in NIS can I amend this rule?

I have tried the NIS kowledge base and sent them a technical query - but no joy as yet.

Thanks for any advice that anyone can offer.

BSU