Has anyone else had problems with AFF. net?

Firefox is suddenly blocking it as a possible attack site, and I have no idea as to why. It's making me paranoid. I was wondering if anyone else was having that issue. I've talked to a few other users there who are having the same problem. I'm running a full virus scan just to be on he safe side, but I really hope this is just a tech fart or something because of some ads. Ergh. Happy Birthday  to me.