Index: mozilla-esr31/browser/app/profile/firefox.js =================================================================== --- mozilla-esr31/browser/app/profile/firefox.js +++ mozilla-esr31/browser/app/profile/firefox.js 2014-09-06 00:39:07.548100720 +0200 @@ -269,7 +269,7 @@ #endif // At startup, check if we're the default browser and prompt user if not. -pref("browser.shell.checkDefaultBrowser", true); +pref("browser.shell.checkDefaultBrowser", false); pref("browser.shell.shortcutFavicons",true); // 0 = blank, 1 = home (browser.startup.homepage), 2 = last visited page, 3 = resume previous browser session