Please don’t use serif fonts for UI elements. Imagine the buttons on your file manager being Times New Roman. (eww.) I think what you’re looking for is a monospaced font that’s designed to distinguish O/0, I/1/l, etc.

Plug for one of my favorite fonts: https://www.jetbrains.com/lp/mono/

Firefox has always had been the most attractive to many people.

Yes it was the GrapheneOS team who said that. See the paragraph just above Camera. I literally just skimmed their guides and saw this yesterday while considering getting a Pixel.