Solution to not being able to open Comcast Home Page in Foxfire 26

I was not able to open my Comcast Home Page in Firefox after (10) Windows 7 Ultimate updates, today, December 11, 2013.  Reinstalling Firefox did not solve the problem.  The problem was solved by changing Firewall Setting, tab Program Rules from "Automatic" to ''Allow'' in Norton Security Suite.  I am using Norton Security Suite from Comcast.