I guess no browser is perfect...not even Mozilla.
The Register Article - Mozilla riddled with security holes
http://www.theregister.co.uk/content/55/27934.html
SlashDot Article - Mozilla: The Good And The Bad
http://slashdot.org/article.pl?sid=02/11/06/189211&mode=thread&tid=154
Mozilla Vulnerability Risk List (Not Complete)
http://www.mozilla.org/projects/security/known-vulnerabilities.html
The Register Article - Mozilla riddled with security holes
http://www.theregister.co.uk/content/55/27934.html
SlashDot Article - Mozilla: The Good And The Bad
http://slashdot.org/article.pl?sid=02/11/06/189211&mode=thread&tid=154
Mozilla Vulnerability Risk List (Not Complete)
http://www.mozilla.org/projects/security/known-vulnerabilities.html