Set start page override and home page to be http://www.mozilla.org/start , a page encouraging people to get involved with Mozilla. r,a=asa.

suite/locales/en-US/chrome/browser/region.properties

@@ -11,7 +11,7 @@ otherSearchURL=http://home.netscape.com/bookmark/6_0/tsearch.html
 #
 # all.js
 #
-browser.startup.homepage=http://www.mozilla.org/
+browser.startup.homepage=http://www.mozilla.org/start
 browser.throbber.url=http://www.mozilla.org/
 browser.search.defaulturl=http://search.netscape.com/cgi-bin/search?search=
 
@@ -20,5 +20,4 @@ wallet.Samples=http://www.mozilla.org/wallet/samples/
 
 #config.js
 #
-startup.homepage_override_url=http://www.mozilla.org/mozorg.html
-
+startup.homepage_override_url=http://www.mozilla.org/start