ora bem o meu ficheiro ficou assim:
# Mozilla User Preferences
/* Do not edit this file.
*
* If you make changes to this file while the application is running,
* the changes will be overwritten when the application exits.
*
* To make a manual change to preferences, you can visit the URL about:config
* For more information, see
http://www.mozilla.org/unix/customizing.html#prefs */
user_pref("app.update.lastUpdateTime.addon-background-update-timer", 1197847899);
user_pref("app.update.lastUpdateTime.background-update-timer", 1197847899);
user_pref("app.update.lastUpdateTime.blocklist-background-update-timer", 1197847899);
user_pref("app.update.lastUpdateTime.search-engine-update-timer", 1197894708);
user_pref("browser.download.manager.alertOnEXEOpen", true);
user_pref("browser.shell.checkDefaultBrowser", false);
user_pref("browser.startup.homepage_override.mstone", "rv:1.8.1.11");
user_pref("extensions.lastAppVersion", "2.0.0.11");
user_pref("extensions.update.notifyUser", false);
user_pref("intl.charsetmenu.browser.cache", "windows-1252, ISO-8859-1, UTF-8");
user_pref("network.cookie.prefsMigrated", true);
user_pref("security.warn_entering_secure", false);
user_pref("security.warn_leaving_secure", false);
user_pref("security.warn_submit_insecure", false);
user_pref("spellchecker.dictionary", "pt-PT");
user_pref("urlclassifier.tableversion.goog-black-enchash", "1.40399");
user_pref("urlclassifier.tableversion.goog-black-url", "1.16995");
user_pref("urlclassifier.tableversion.goog-white-domain", "1.23");
user_pref("urlclassifier.tableversion.goog-white-url", "1.371");
user_pref("xpinstall.whitelist.add", "");
user_pref("xpinstall.whitelist.add.103", "");
user_pref("capability.policy.policynames", "localfilelinks");
user_pref("capability.policy.localfilelinks.sites", "
http://www.sysemp.com");
user_pref("capability.policy.localfilelinks.checkloaduri.enabled", "allAccess");