diff --git a/browser/base/content/browser-box.inc.xhtml b/browser/base/content/browser-box.inc.xhtml
index 2ca8bdd2674fb4addf3bbf94ff17abc5c93c6293..dd965d8d190e8cdacbeb3d80995ad1a906e64079 100644
--- a/browser/base/content/browser-box.inc.xhtml
+++ b/browser/base/content/browser-box.inc.xhtml
@@ -26,7 +26,13 @@
     <splitter id="sidebar-splitter" class="chromeclass-extrachrome sidebar-splitter" resizebefore="sibling" resizeafter="none" hidden="true"/>
     <box id="after-splitter"></box>
   </div>
+<vbox flex="1" id="zen-appcontent-wrapper">
+<html:div id="zen-appcontent-navbar-container"></html:div>
+<hbox id="zen-tabbox-wrapper" flex="1">
   <tabbox id="tabbrowser-tabbox" flex="1" tabcontainer="tabbrowser-tabs">
+#include zen-tabbrowser-elements.inc.xhtml
     <tabpanels id="tabbrowser-tabpanels" flex="1" selectedIndex="0"/>
   </tabbox>
 </hbox>
+</vbox>
+</hbox>