The window.navigator.plugins object in Mozilla Firefox before 3.0.19, 3.5.x
before 3.5.9, and 3.6.x before 3.6.2, and SeaMonkey before 2.0.4, does not
properly manage memory during a page reload, which allows remote attackers
to execute arbitrary code or cause a denial of service (application crash)
via unspecified vectors that trigger deletion of referenced objects,
related to a "dangling pointer vulnerability."