A WarpIn Installer for Firefox 24.3.0 had been uploaded to hobbes (2014/06/07).
http://hobbes.nmsu.edu/h-search.php?key=firefox-24.3.0.en-us.os2.beta-wpi.wpi
Remember that Firefox requires some DLLs.
http://hobbes.nmsu.edu/h-search.php?key=moz_required_dlls_v1.zip