diff --git a/browser/components/preferences/preferences.js b/browser/components/preferences/preferences.js
index 7e21bab426b6eb52fe84876d817fddbdb1a35ffc..445940903fb28d332e5436634fa9546ec812a130 100644
--- a/browser/components/preferences/preferences.js
+++ b/browser/components/preferences/preferences.js
@@ -122,6 +122,7 @@ ChromeUtils.defineLazyGetter(this, "gSubDialog", function () {
       styleSheets: [
         "chrome://browser/skin/preferences/dialog.css",
         "chrome://browser/skin/preferences/preferences.css",
+        "chrome://browser/skin/preferences/zen-preferences.css",
       ],
       resizeCallback: async ({ title, frame }) => {
         // Search within main document and highlight matched keyword.
@@ -196,6 +197,10 @@ function init_all() {
   // the entire document.
   Preferences.queueUpdateOfAllElements();
   Services.telemetry.setEventRecordingEnabled("aboutpreferences", true);
+  register_module("paneZenLooks", gZenLooksAndFeel);
+  register_module("paneZenTabManagement", gZenWorkspacesSettings);
+  register_module("paneZenCKS", gZenCKSSettings);
+  register_module("paneZenMarketplace", gZenMarketplaceManager);
 
   register_module("paneGeneral", gMainPane);
   register_module("paneHome", gHomePane);