This font may be useful for resolving some symbols (like 🐼, 😻) in Emacs. I don't know what license should be used, as the only mention about the license is the following note from : «In lieu of a licence: Fonts in this site are offered free for any use; they may be opened, edited, modified, regenerated, posted, packaged and redistributed.» Is it OK to use "fsf-free" for this package?