Related link: http://bugzilla.mozilla.org/show_bug.cgi?id=74821
MathML is an XML dialect used for representing Mathematics (with both content markup and presentation markup). Mozilla 1.0 and Netscape 7 display MathML beautifully. Complex math equations render impressively — but not on the Mac. To see the potential, check out the test suite at http://www.w3c.org/Math. The reason that this doesn’t work on Mac OS X has been recorded in the bug you’ll find by following the bugzilla link. Check out the page and see if there’s anything you might be able to do to help.