XUL File Preamble
•<?xml version="1.0"?>
•<?xml-stylesheet href="chrome://global/skin/xul.css" type="text/css"?>
•<!DOCTYPE window>
•<window xmlns:html=http://www.w3.org/TR/REC-html40 xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">