gecko-dev/suite/browser/viewSource.xul

<?xml version="1.0"?> 
<?xml-stylesheet href="chrome://navigator/skin/" type="text/css"?> 

<?xul-overlay href="chrome://navigator/content/navigatorOverlay.xul"?>
<?xul-overlay href="chrome://communicator/content/tasksOverlay.xul"?>

<!DOCTYPE window SYSTEM "chrome://navigator/locale/viewSource.dtd" >
<window id="main-window" xmlns:html="http://www.w3.org/1999/xhtml"
     xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
	onload="onLoadViewSource()"
	title="&mainWindow.title;" 
	titlemodifier="&mainWindow.titlemodifier;" 
	titlepreface="&mainWindow.preface;"
	titlemenuseparator ="&mainWindow.titlemodifierseperator;"  
	windowtype="Browser:view-source"
	align="vertical" width="640" height="480"
	screenX="10" screenY="10"
	persist="screenX screenY width height sizemode"> 
  

  <script language="javascript" src="chrome://global/content/nsJSSupportsUtils.js"></script>
  <script language="javascript" src="chrome://global/content/nsJSComponentManager.js"></script>
  <script language="javascript" src="chrome://global/content/nsTransferable.js"></script>
  <script language="javascript" src="chrome://global/content/nsDragAndDrop.js"></script>

  <script language="javascript" src="chrome://navigator/content/viewSourceDD.js"></script>
  <script language="javascript" src="chrome://navigator/content/viewsource.js"></script>

  <broadcasterset id="broadcasterset"/>

	<commands id="commands">
		<commandset id="globalEditMenuItems"/>
		<commandset id="selectEditMenuItems"/>
		<commandset id="undoEditMenuItems"/>
		<commandset id="clipboardEditMenuItems"/>
	</commands>

  <!-- keys are appended from the overlay -->
  <keyset id="keyset"/>

  <!-- Menu -->
  
    <box id="appcontent" align="vertical" flex="1"
      ondragover="nsDragAndDrop.dragOver(event, contentAreaDNDObserver);"
      ondraggesture="nsDragAndDrop.startDrag(event, contentAreaDNDObserver);">

      <iframe id="content-frame" type="content-primary" name="content" src="about:blank" flex="1"/>

  </box>

</window>