Firava adapts Mozilla's open source Fira Sans typeface into a variable version.
View the sample page.
Download the .woff2, .tff, and Base64 (embedded in .css) fonts from the /fonts folder here.
I'm using the following tools to produce Firava:
I've found Travis Kochel's I Can Variable Font super-helpful throughout this process.
Wakamai Fondue is indispensable for testing variable fonts.
And I used my own Glytter tool to view/copy/paste the full character set for the sample page.
Firava and Fira Sans are licensed under the SIL Open Font License, Version 1.1.
Fira Sans digital data is ©2012-15, The Mozilla Foundation and Telefonica S.A.
Firava was produced by Greg Gibson (hellogreg.org). I generated it for a simple reason: I love Fira Sans and wanted to use it for a project, but I needed a variable font!