问题
Fira Sans seems to be the default font, but I'm wondering what other fonts are on the device that can be used by apps via CSS.
回答1:
This file describes the fonts that are installed in Firefox OS: https://github.com/mozilla-b2g/moztt/blob/master/fonts.mk. This is for the master branch. Check the other branches in the git repository to find out about fonts available in a specific Firefox OS version.
回答2:
You can check this site for the different typeface supported by firefox os https://www.mozilla.org/en-US/styleguide/products/firefox-os/typeface/
来源：https://stackoverflow.com/questions/20207159/what-are-the-system-fonts-of-firefox-os