You should use font-family: monospace, "Courier New" instead, I think. That's a hack we used to solve the other instances, at least.
font-family: monospace, "Courier New"
It should be the other way around: font-family: "Courier New", monospace (see [1])
font-family: "Courier New", monospace
No. You actually do want the behavior of monospace, you just need to add an existing font name after it to work around a bug in Firefox.
monospace
What is the point of adding 'monospace' when we force 'Courier New' already ?
Someone who doesn't have Courier New wouldn't be getting any monospace font at all then.
That is the safest way. Got it with r83460, resetting to 'new'.
This shouldn't be applied with inline styles, but should instead use CSS; probably by adding the #mw-debug-html selector to the existing list of items which are formatted in monospace in shared.css.
Since it is just for developers, is there any need to get it in a public / user stylesheet ?
Can someone please re review this developer only CSS tweak? I believe both r83336 and r83460 are fine :-b
I'll see you a review and raise you a follow-up :D