Designed by Typotheque
Zilla Slab is Mozilla's core typeface, used for the Mozilla wordmark, headlines and throughout their designs. A contemporary slab serif, based on Typotheque's Tesla, it is constructed with smooth curves and true italics, which gives text an unexpectedly sophisticated industrial look and a friendly approachability in all weights. This is the Highlight sister family.
You can download font files directly and install them with Font Book. However, it’ll be much easier to install these fonts with RightFont — the best font manager for Mac.
These fonts are licensed under the Open Font License.
You can use them freely in your products & projects - print or digital, commercial or otherwise.