Firefox on Windows supports Windows high contrast mode

[mraccess77]

Firefox has and still does support hgh contrast. See settings to have it ignore the page colors.

[atanassov]

You're correct in pointing this out. The support in Firefox has been there for a while and we're aware of it. The implementation is however partial in that link colors aren't mapped to the system colors and that results in worse (or random, depending on the user colors) contrast ratios.

Further, Firefox followed the model of Internet Explorer where we stripped all of the background images in order to guarantee contrast ratios. This approach is too invasive for the web, to the point where some pages become unrecognizable (try flick.com).

Our current proposal is to follow the model of Microsoft Edge as described by this explainer.