Nice Rated 5 out of 5 stars

Really nice and smooth theme!
But I wonder how do you accomplish that, for example google background is also all black?

This review is for a previous version of the add-on (5.1.3). 

Thanks for your review. The page you see on screenshot is the one which appear when you type "about:home" in the url bar. By default it is in light color, but if you install "Stylish" addon and then install a custom dark style I created for this "about:home" page, you can get something looking like on screenshot. So once you would have installed Stylish then go here to install my dark style >

By the way, for questions and/or bug reports it s better to use the support link in the addon description and to not write here. Normally I don t offer support here