source: https://www.securityfocus.com/bid/26216/info Mozilla Firefox is prone to a vulnerability that results in a persistent denial of service. This issue occurs when a victim sets a malicious bookmark and then follows it. Successful attacks will cause Firefox to stop responding to all URI requests. NOTE: This condition persists even after the browser is restarted. Mozilla Firefox 2.0.0.8 is vulnerable; other versions may also be affected.