add: var webBrowserPrint = printEngine.webBrowserPrint; webBrowserPrint.exitPrintPreview(); 
context: function BrowserExitPrintPreview(){  window.close();}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/fdc7ba698ebb4b815b0d1a00c7c6db4ab16b8251/msgPrintEngine.js/buggy/mailnews/base/resources/content/msgPrintEngine.js