Firefox is a stand alone browser.
It should automatically import your bookmarks from Netscape. If it doesn’t, ping me back, and I’ll dig out an old copy of Netscape and walk you through the process.
Or, if you are in the mood for adventure, try SeaMonkey. It’s the complete suite to replace Mozilla. http://www.seamonkey-project.org/
Once you download Firefox, I recommend that you download a couple of plug ins - Cookiesafe and Flashblock will make your browsing safer and more enjoyable.
Then after I do all that and import my Netscape bookmarks, do I uninstall all the Netscapes I have on my computer? I run on XP.