--- mozilla-release/browser/app/profile/firefox.js.disable-software-update	2012-12-29 13:42:02.000000000 +0400
+++ mozilla-release/browser/app/profile/firefox.js	2012-12-29 13:43:37.579380192 +0400
@@ -225,7 +225,7 @@ pref("general.autoScroll", true);
 pref("general.useragent.complexOverride.moodle", false); // bug 797703
 
 // At startup, check if we're the default browser and prompt user if not.
-pref("browser.shell.checkDefaultBrowser", true);
+pref("browser.shell.checkDefaultBrowser", false);
 
 // 0 = blank, 1 = home (browser.startup.homepage), 2 = last visited page, 3 = resume previous browser session
 // The behavior of option 3 is detailed at: http://wiki.mozilla.org/Session_Restore