add: var webBrowserPrint = printEngine.webBrowserPrint; webBrowserPrint.exitPrintPreview(); 
context: function BrowserExitPrintPreview(){  window.close();}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/d13c53e98d9d9a10ca24113a32d2bba184d19004/msgPrintEngine.js/buggy/mailnews/base/resources/content/msgPrintEngine.js