diff --git a/xpfe/browser/resources/content/viewSource.xul b/xpfe/browser/resources/content/viewSource.xul
index 4f1fde9c2d9f..ee6701f4eef9 100644
--- a/xpfe/browser/resources/content/viewSource.xul
+++ b/xpfe/browser/resources/content/viewSource.xul
@@ -175,6 +175,6 @@
     <browser id="content" type="content-primary" name="content" src="about:blank" flex="1"
              context="viewSourceContextMenu"/>
 
-  </vbox>
+  </vbox> 
 
 </window>