[whalesalad]

If you want excellent ligature support I would recommend Fira Mono. There are powerline variants, too. Lately I have been in love with IBM Plex Mono, but no ligature support.

[wprl]

You can add the Fira ligatures to any font with Ligaturizer. Personally I use it with CMU Typewriter.

[1]: https://github.com/ToxicFrog/Ligaturizer

[LudwigNagasena]

I remember that I tried to use it to add ligatures to Fira Sans and it didn't work well.

[manusachi]

I also like both of them. I use Fira Code (https://github.com/tonsky/FiraCode) for code editor and IBM Plex Mono for terminal.

[whalesalad]

oh yeah, I meant to say Fira Code actually! Great font.