Early Internet surfers, which of course means something less than a decade ago for most of us, will remember days when Netscape was only real browser in town. For those who don't remember, there was a time when Netscape was for sale in computer stores, for anywhere from $20 to $50, depending on which version you wanted.

Then Microsoft's free Internet Explorer (IE) came along, knocked out Netscape as a contender to all but a relatively few users, and dominated browser market for years. IE has gained a reputation of being vulnerable to various types of attacks, and in recent years though, several challengers have appeared. And they're good. Really good.