When comparing MT Courier 12 vs Fira Mono, the Slant community recommends Fira Mono for most people. In the question“What are the best programming fonts?” Fira Mono is ranked 51st while MT Courier 12 is ranked 77th. The most important reason people chose Fira Mono is:
Almost looks like Source Code pro and works great with Intelli J where Source Code Pro renders all junk on one of the primary IDE. Very good for people who read code through out the day.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Clear glyph resolution
Pro Simple yet effective
Pro Comes pre-installed on almost any operating system
This means that the user doesn't have to go to the bother of installing anything.
Pro Looks great and is easy on eyes
Almost looks like Source Code pro and works great with Intelli J where Source Code Pro renders all junk on one of the primary IDE.
Very good for people who read code through out the day.
Pro Extremely readable
You can look at the code for hours and hours. The height between lines and the spacing is perfect.
Pro Offers better performance in some Emacs builds
This font is used by some Emacs users on Mac OS X in order to get better performance.
Cons
Con 1 (one) and lowercase l (ell) are very similar and can be confused
Con Doesn't look very good
Con Doesn't have a slashed zero
Con Large line height
Compared to other options, Fira has a high line height, which reduces the number of lines you can see on screen at one time.