This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
most dialog boxes like that have a checkbox labeled "don't display this message again" I would recommend getting the new mozilla 1.0 though. it is a big improvement over netscape 4.7 it will use your existing preferences and stuff from netscape i used to use IE5.5 rather than netscape 4.7 but mozilla is better than either.