Designed to integrate with the character of the Mozilla FirefoxOS, the Fira typefaces also aim to cover the legibility needs for a large range of handsets varying in screen quality and rendering.
The Fira font family comes in 3 widths, all accompanied by italic styles. The package also includes a Mono Spaced variant.
This project is led by Carrois, a type foundry based in Berlin. To contribute, see github.com/mozilla/Fira