The MVPS HOSTS file was updates on January18, 2013 http://winhelp2002.mvps.org/hosts.htm
Windows 7 Pro SP1 (64-bit), avast! v17 Free, MBAM Pro, Windows Firewall, OpenDNS Family Shield, SpywareBlaster, MVPS HOSTS file, MBAE Premium, MCShield, WinPatrol PLUS, SAS (on-demand scanner), Zemana AntiLogger Free, IE11 & Firefox (both using WOT [IE set to WARN, FF set to BLOCK]), uBlock Origin, CryptoPrevent, Secunia PSI.
[I believe computer-users who sandbox (Sandboxie) are acting prudently.]
Update via the program's internal updater (HELP / About Firefox / Check for Updates)