I love Firacode and use it in Android Studio/IntelliJ but it has this bug[0] where "=" is invisible in Gnome terminal. So, I had to switch to Fira Mono[1], the parent of Fira Code, from Mozilla. Fira Mono doesn't have cool ligatures but it's a good font and works pretty well.

[0] : https://github.com/tonsky/FiraCode/issues/162 [1] : https://github.com/mozilla/Fira