diff --git a/browser/base/content/browser.xul b/browser/base/content/browser.xul
index 898522ed661a..ba0b3cdae4db 100644
--- a/browser/base/content/browser.xul
+++ b/browser/base/content/browser.xul
@@ -944,6 +944,7 @@
   </toolbox>
 
   <hbox flex="1" id="browser">
+    <vbox id="browser-border-start" hidden="true" layer="true"/>
     <vbox id="sidebar-box" hidden="true" class="chromeclass-extrachrome">
       <sidebarheader id="sidebar-header" align="center">
         <label id="sidebar-title" persist="value" flex="1" crop="end" control="sidebar"/>
@@ -963,6 +964,7 @@
                   autocompletepopup="PopupAutoComplete"
                   onclick="return contentAreaClick(event, false);"/>
     </vbox>
+    <vbox id="browser-border-end" hidden="true" layer="true"/>
   </hbox>
 
   <vbox id="browser-bottombox" layer="true">
diff --git a/browser/themes/winstripe/browser/browser-aero.css b/browser/themes/winstripe/browser/browser-aero.css
index 9dd096d83836..4dd2da1ebd3c 100644
--- a/browser/themes/winstripe/browser/browser-aero.css
+++ b/browser/themes/winstripe/browser/browser-aero.css
@@ -120,6 +120,16 @@
     border-color: @glassToolbarBorderColor@ !important;
     background-clip: padding-box;
   }
+  #main-window[sizemode="normal"] #browser-border-start,
+  #main-window[sizemode="normal"] #browser-border-end {
+    display: -moz-box;
+    background-color: @glassToolbarBorderColor@;
+    width: 1px;
+  }
+  #main-window[sizemode="normal"] #browser-bottombox {
+    border: 1px solid @glassToolbarBorderColor@;
+    border-top-style: none;
+  }
 
   #main-window[sizemode="normal"] #navigator-toolbox[tabsontop="true"] > #nav-bar:not([inFullscreen="true"]):not(:-moz-lwtheme),
   #main-window[sizemode="normal"] #navigator-toolbox[tabsontop="true"]:not([customizing]) > #nav-bar[collapsed="true"] + toolbar:not([inFullscreen="true"]):not(:-moz-lwtheme),