Designed to integrate with the character of the OS, the Fira Sans typeface also aims to cover the legibility needs for a large range of handsets
varying in screen quality and rendering. When working with Fira Sans it is recommended that micro font sizes that fall below our guidelines are
avoided.
abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890.:,;"(!?)+-*/=
For more information on the design and specification of the Fira typeface: Firefox-OS Typeface.