I have checked with Comcast and all systems go.......FF is running really slow on transfering data. OR I get a bunch of WAITING for.......Videos are buffering forever and then when they go on, they constantly cut out, sometimes, they don't come back on at all. I wish I knew how to check what version of FF ( Newbie!)I am using but I only D/L it in the last few weeks....This problem has been much worse in the last few days.