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 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 3 weights (Regular, Medium, Bold.)

This project is led by Carrois, a type foundry based in Berlin. To contribute, see github.com/mozilla/Fira

Updated: Feburary 2016, all existing styles updated to v4.106g with vertical metrics adjusted to the previous values.