eyedeekay
Best I can do for Firefox is in a profile prefs.js/user.js
eyedeekay
But for Chromiums I can set forced-color-override
eyedeekay
user_pref("browser.display.use_system_colors", false);
eyedeekay
Firefox seems like it will eventually support forced-color-override or -ms-forced-color-override
dr|z3d
zzz: ...?