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. See www.mozilla.org/en-US/styleguide/products/firefox-os/typeface/ for more details.
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 the Mono Spaced variant with 2 weights (Regular, Medium Bold.) and a Condensed variant with 32 styles.
More link: http://www.google.com/fonts/specimen/Fira+Mono
Free for Personal Use
This fonts are authors' property, and are either shareware, demo versions or public domain. The licence mentioned above the download button is just an indication. Please look at the readme-files in the archives or check the indicated author's website for details, and contact him if in doubt. If no author/licence is indicated that's because we don't have information, that doesn't mean it's free.