I use Netscape 6.2.3. It is based on Mozilla/5 and Gecko. It's interface is more like IE than earlier Netscapes.
If you also have IE on the machine, an entry in the NS "bookmarks" list takes you to your IE "favorites", so you don't have to move them, and even the latest additionas to your IE "favorties" are available fropm NS 6.
As others have said, a few web sites only work right w/ IE, so you have to keep iut around.
NS6 works with Pop-Up Stopper and ZoneAlarm.