ontop of my ibook g4...i have a indigo clamshell i want to make run pretty decently...which it is except for internet explorer 5 which is on it. i want to install a newer browser, and i believe IE is no longer supported by mac so i tried to install firefox but something went wrong saying something was invalid. should i try netscape...since i use it mostly for ebay...or what else should i use. thanks in advance.