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.
The typeface itself was designed by notable type designers Erik Spiekermann and Ralph du Carrois, a font that is clear and legible at most sizes and display qualities. Spiekermann also designed FF Meta, the original font used by the Firefox OS, and it’s clear that Fira Sans is heavily based on FF Meta.
The Fira font family comes in a Sans Serif with 4 weights (light, regular, medium and bold) all accompanied by italic styles. The package also includes a Mono Spaced variant with 2 weights (regular and bold).Fira Sans