https://www.mozilla.org/en-US/security/advisories/mfsa2016-89/ https://www.mozilla.org/en-US/security/advisories/mfsa2016-90/
*** Bug 600032 has been marked as a duplicate of this bug. ***
Included thunderbird on this bug as it's actually ready. ATs please stabilize: www-client/firefox-45.5.0 target KEYWORDS="ppc ppc64 x86" mail-client/thunderbird-45.5.0 target KEYWORDS="ppc ppc64 x86" (I've stabilized for amd64 already myself)
x86 stable
This issue was resolved and addressed in GLSA 201701-15 at https://security.gentoo.org/glsa/201701-15 by GLSA coordinator Thomas Deutschmann (whissi).