Mozilla has released Firefox 3.6.14 and
3.5.17 and Thunderbird 3.1.8, each of
which fix some security vulnerabilities, including some that are
marked "critical". Mozilla strongly recommends that all users upgrade to
the new releases. Each Firefox release fixes eight critical, one high, and
one moderate vulnerability (3.6.14,
while the Thunderbird release fixes two critical, and one moderate flaw (3.1.8).