Kind of a click-baity title; I apologize.

For some while now I've been seeing the abbreviation of Firefox slowly mutate from Fx/fx to FF.

From the release notes:

How do I spell Firefox? How do I abbreviate it?

Firefox is spelled F-i-r-e-f-o-x - only the first letter capitalized (i.e. not FireFox, not Foxfire, FoxFire or whatever else a number of folk seem to think it to be called.) The preferred abbreviation is "Fx" or "fx".

I mean, it makes total sense to abbreviate Firefox with two capital Fs, and the documentation does say "preferred abbreviation," but I just wanted to make those of you who didn't know about this aware...aware of the fact that you're abbreviating Fx wrong, God dammit!