lockPref("browser.shell.checkDefaultBrowser", false);
lockPref("media.autoplay.default", 0);
lockPref("media.autoplay.enabled.user-gestures-needed", false);
lockPref("extensions.autoDisableScopes", 0);
lockPref("extensions.enabledScopes", 15);
lockPref("security.ssl.enable_ocsp_stapling", false);
lockPref("network.stricttransportsecurity.preloadlist", false);
lockPref("network.http.phishy-userpass-length", 300);