Inspired by the earlier thread today on Mozilla and MathML I have put together two spec files to aide people in the installation of the MathType and Mathematica fonts: http://mpeters.us/fc_extras/mathematica_ttf.spec http://mpeters.us/fc_extras/mathtype_ttf.spec The necessary source files (that contain the fonts) can be downloaded from the URL field of the specfile. Of course you don't need to make rpm's, but making rpms makes it easier to install on a bunch of machines (especially if you run a private yum repo) Those fonts combined with the mathml-fonts from Fedora Extras should provide the fonts needed to view MathML in Firefox (and the pango thing mentioned by Eric Tanguy in the other thread).