Oh, well, the PS3's web browser is pretty poor. I only use it when I want to look up something on IMDb for a movie I just watched. Don't trust it to handle most sites correctly. Just sign up for Netflix from a real computer. Then go to netflix.com/PS3 and request the steaming disc. Since your son is playing online games, it's connected correctly.

Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris