Gmail Mono

Does exactly what it's supposed to do. The extension's source is just one css file, very simple - that increases my confidence a lot.

Great for reading output from bash scripts and similar computer generated reports via email.

working great. Is there a setting which also works for the View Entire Message display? Paul

It works, but you have to reload Gmail first. And of the course the extension gets access to all of your email. Keep that in mind.

simple and effective. plain text emails as they are supposed to be, monospaced.