Dark firefox even in "text" urls

I've been using dark reader for some time and I'm quite happy with it. Not a huge memory hog (just sometimes) and works pretty decently everywhere.

But I just discovered https://fedidat.com/640-dark-newtab-firefox/, where it tells how to darken also new tabs and urls with text mimetype

You just have to open about:config and set both browser.display.background_color and browser.display.foreground_color  to something that makes sense.