MathML Font Settings wót Frédéric Wang

This add-on adds a "MathML font settings" item into the context menu so that users can configure the CSS style of mathematical formulas (font-family and font-size). A list of known fonts with a MATH table are provided and can be used in Firefox 31 or higher. See https://developer.mozilla.org/en-US/docs/Mozilla/MathML_Project/Fonts for how to install these fonts.

Note: The *advanced font preference menu* of Gecko-based browsers also provide similar font configuration for mathematics.