As designers in open source, we’re constantly looking for opportunities to bring the principles of universal access and redistribution to new areas. While the term “open source” may still be mainly associated with code, the value in free collaboration benefits every discipline – particularly design.

In that spirit, the Mozilla Foundation commissioned famed typographer Erik Spiekermann to create a completely free, open-source typeface in 2013. Thus was born Fira Sans, a gorgeous san-serif font that looks great on the web. So great, in fact, that we’ll be using it in Firefox’s in-content pages such as Preferences and the Add-ons Manager.

If you haven’t tried out Fira Sans, now’s a great time: version 3.1 introduces 16 different weights, a huge character map, and extensive language support. Also available is Fira Mono, a monospaced version of the original. Give it a spin on your next project!