source: https://www.securityfocus.com/bid/11823/info Mozilla/Netscape and Firefox browsers are reported prone a remote denial of service vulnerability. It is reported that the affected browsers will crash as a result of a NULL pointer dereference when a JavaScript function attempts to print an IFRAME that is embedded in the page. Replace '[' with '<' and ']' with '>'. [iframe id="pocframe" name="pocframe" src="about:blank">window.frames.pocframe.print();