A weakness is found in firefox version 1.X and 0.X it is marked as "LESS CRITICAL" and is unpatched more can be found at

http://secunia.com/advisories/14565/


and more information about vulnerability specific to mozilla firefox is found at

http://secunia.com/product/4227/


4 out of 12 Secunia advisories, are marked as "Unpatched" in the Secunia database !!