rem: return document.getElementById("content").webNavigation; 
add: return getPPBrowser().webNavigation; 
context: function getWebNavigation(){  try {    return document.getElementById("content").webNavigation;  } catch (e) {    return null;  }}
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/c94e8974ee1234ea0cafe0ff4be174099796cacb/msgPrintEngine.js/buggy/mailnews/base/resources/content/msgPrintEngine.js