[edwintorok]

There is, but it is not clear to me which variant is the "master" font, is it the OTF? https://github.com/mozilla/Fira

[mlkmt]

Nice, but I didn't mean putting the binary files on git. It's not easy to see changes since the file format is not text based.

[edwintorok]

Yeah it'd be nice if they used something like UFO ( http://unifiedfontobject.org/), or even Fontforge's SFD. It should be possible to take each binary OTF, export it with fontforge, and create a "mirror" repository where you can see the changes in a more human-readable format.