diff --git a/settings/omegafox.cfg b/settings/omegafox.cfg
index fe555ad..ee34fee 100644
--- a/settings/omegafox.cfg
+++ b/settings/omegafox.cfg
@@ -706,4 +706,7 @@ defaultPref("privacy.partition.serviceWorkers", true);
 // Clear cookies and site data on shutdown
 defaultPref("privacy.clearOnShutdown.cookies", true);
 defaultPref("privacy.clearOnShutdown.siteSettings", true);
-defaultPref("network.cookie.lifetimePolicy", 2);
\ No newline at end of file
+defaultPref("network.cookie.lifetimePolicy", 2);
+
+// HTTPS-only
+defaultPref("dom.security.https_only_mode", true);
\ No newline at end of file