Fira Sans Free Font

Fira Sans is designed to integrate with the character with Mozilla Firefox OS and also aims to fulfill the legibility needs of a wider range of handheld devices which vary in screen quality and rendering. The Fira Font Family comes in a Sans Serif with 4 four weights (Light, Regular, Medium and Bold) all including an italic styles.
More info about the project: Fira on GitHub

Download Fira Sans