The WarpIn installer for Freetype and OS/2 fontconfig DLLs is avaible for donwload at hobbes:
Hobbes: http://hobbes.nmsu.edu/h-search.php?key=mzfntcfgft_runtime
These are required for Firefox 10.12ESR, SeaMonkey 2.7.2.12, Thunderbird 10.12ESR, and later versions.