Firefox and Tor have both been updated to patch the zero day flaw. Thanks Tim C. for the heads up.
Download Firefox:
Download 32-bit(en-US)
Download 64-bit (en-US)
All Downloads
Release Notes
Download Tor:
https://www.torproject.org/download/download.html.en
Richard Freeston says
Thunderbird has also been updated
Eric (a.k.a. TweakHound) says
Thanks but stopped using email clients. IMHO they are not safe.