Mozilla has released version 24 of Firefox and Thunderbird. Firefox 24, which fixes 10 critical and 10 lesser vulnerabilities, becomes the new Extended Support Release. This version also removes support for Certificate Revocation Lists (CRLs)…. Mozilla has released version 24 of Firefox and Thunderbird. Firefox 24, which fixes 10 critical and 10 lesser vulnerabilities, becomes the new Extended Support Release. This version also removes support for Certificate Revocation Lists (CRLs).

Read more http://www.zdnet.com/firefox-24-fixes-many-serious-vulnerabilities-7000020808/