blocked sites and/or firewall

I was in a hotel and got a message while i was on wirelessly that some site was trying to access my computer. I inadvertently blocked it without reading who it was. I now cannot access any websites on my firefox. I am able to go to internet explorer and get to sites perfectly fine. So I somehow must have blocked everything to do with firefox. I have checked everywhere through comodo internet security screens and can’t find anywhere to unblock firefox. Can anyone help me? Thank you.

Go to Firewall → Advanced -->Network Security Policy → Application Rules → now look up the rule for FF and edit it to have the Browser policy.