How to get rid of Netscape Messenger's Netscape.com advertisement (which loads every time)
Netscape mail users have been eternally frustrated with Messenger's Netscape.com advertisement (which loads every time).
To avoid this, you should edit your preferences file (PREFS.JS) while Netscape is NOT running.
Change the following line to reflect your choice:
user_pref("mailnews.start_page.enabled", false);
While you're at it, you can change the Messenger Start Page to any URL of choice by entering the following snippet on one line:
user_pref("mailnews.start_page.url", "http://www.wherever.com/");