Mozilla issued new versions of Firefox, Thunderbird and SeaMonkey on August 16. See the links below for details and downloading.
Firefox – Version 6.0 of Firefox was released on August 16.
NOTE: Resources indicate that several vulnerabilities have been identified in Firefox version 5.0.1 and also Firefox version 3.6.19. The recommendation provided by the vendor is to update these versions to 6.0 and 3.6.20 respectively.
Thunderbird – current release is version 6 – update was issued on August 16
SeaMonkey – current release is 2.3 – patch issued on August 16