hi rfox, the common method to lock certain preferences is explained in this article: http://kb.mozillazine.org/Locking_preferences

Philpp thanks for the quick response. The configuration file is now recognized by the java script and the one example in the http://kb.mozillazine.org/Locking_preferences article shows locked under about:config! For whatever reason there is something wrong on the syntax for these other settings //Firefox Settings

lockPref(“security.tls.version.min”, 1);
lockPref(“security.default_personal_cert”, “Ask Every Time”);

lockPref(“network.protocol-handler.external.shell”, false);

lockPref(“plugin.disable_full_page_plugin_for_types”, “application/pdf,application/fdf,application/xfdf,application/lsl,application/lso,application/lss,application/iqy,application/rqy,application/xlk,application/xls,application/xlt,application/pot,application/pps,application/ppt,application/dos,application/dot,application/wks,application/bat,application/ps,application/eps,application/wch,application/wcm,application/wb1,application/wb3,application/rtf,application/doc,application/mdb,application/mde,application/ad,application/,application/adp”);

lockPref(“browser.formfill.enable”, false);

lockPref(“signon.autofillForms”, false);
lockPref(“signon.rememberSignons”, false);
lockPref(“privacy.sanitize.sanitizeOnShutdown”, true);
lockPref(“dom.disable_window_open_feature.status”, true);
lockPref(“dom.disable_window_move_resize”, true);
lockPref(“security.tls.version.max”, 3);
lockPref(“dom.disable_window_flip”, true);
lockPref(“dom.event.contextmenu.enabled”, false);
lockPref(“dom.disable_window_status_change”, true);
lockPref(“dom.disable_window_open_feature.status”, true);
lockPref(“browser.startup.homepage”, “about:home”);

lockPref(“app.update.enabled”, false);

lockPref(“extensions.update.enabled”, false);
lockPref(“browser.search.update”, false);
// The end

Found in this article https://slice2.com/2016/03/22/howto-quickly-stig-firefox-45-0-1/

I cant tell the difference though? any thoughts ?

I got it! the " from the article are not recognized in the cfg file format. Thanks for all your help!