We aren't officially supporting Win64 with Firefox 42, but we are producing builds which you can find at http://releases.mozilla.org/pub/firefox/releases/42.0/w

We aren't officially supporting Win64 with Firefox 42, but we are producing builds which you can find at http://releases.mozilla.org/pub/firefox/releases/42.0/win64/ http://releases.mozilla.org/pub/firefox/releases/42.0/win64/ There are only a few bugs left before we can officially support Win64: https://bugzilla.mozilla.org/showdependencytree.cgi?id=558448&hide_resolved=1 https://bugzilla.mozilla.org/showdependencytree.cgi?id=55844...