Some of the new features are that you can decide if you want to set trusted sites to either the Netscape or IE engine, under site controls, Active X comes disabled by default.
sbc wrote:It probably never will be on other OS's, as its IE rendering option depends on Windows.
It is funny how when you mark a site as trusted it switches to IE's engine. Plus in some ways it is more insecure - it inherits vulnerabilities from IE and Firefox, and may even have some of its own.
Netscape was once big, and I doubt they will ever get back what they had. It could have been more successful had AOL not stuck with IE (but then again, if they had gone with Gecko, Firefox would not exist). It's a niche browser now (perhaps even Opera is more popular).