The latest release of DejaVu has a new math font: https://github.com/dejavu-fonts/dejavu-fonts/releases/tag/version_2_36 I expect it will be included on Linux and LibreOffice in the future so we should consider adding them to our list of font-families in mathml.css in order to increase the chance to find a math font.
Created attachment 283751 [details] Patch
Comment on attachment 283751 [details] Patch Seems reasonable. r=me.
Comment on attachment 283751 [details] Patch Clearing flags on attachment: 283751 Committed r203279: <http://trac.webkit.org/changeset/203279>
All reviewed patches have been landed. Closing bug.