from the firefox mathml page: To stop Mozilla from popping up the missing font dialog about TeX fonts, just set this pref in your prefs.js (or your user.js):
user_pref("font.mathfont-family", "Math1, Math2, Math4, Symbol"); -- Pango-enabled firefox breaks MathML support https://launchpad.net/bugs/19066 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs