diff --git a/browser/base/content/browser-box.inc.xhtml b/browser/base/content/browser-box.inc.xhtml
index d445abe7e743b2ec5d46d42f8f149c000e3c7997..80226e0504cc9c3c052a4cce17a6b4f5e6f2d91f 100644
--- a/browser/base/content/browser-box.inc.xhtml
+++ b/browser/base/content/browser-box.inc.xhtml
@@ -18,6 +18,9 @@
   </vbox>
   <splitter id="sidebar-splitter" class="chromeclass-extrachrome sidebar-splitter" resizebefore="sibling" resizeafter="none" hidden="true"/>
   <vbox id="appcontent" flex="1">
+
+#include zen-browser-box-ui.inc.xhtml
+
     <!-- gNotificationBox will be added here lazily. -->
     <tabbox id="tabbrowser-tabbox"
             flex="1" tabcontainer="tabbrowser-tabs">