Really nice space theme that works on my 21:9 display with the browser PX Pixel ratio set on 0.9. Very good.

Clean and Nice

Would be cooler if the pic was higher res

Nice on the eyes, isn't intrusive, and makes it so you can actually read the text on your toolbar. Only issue I have is that it is more blue than similar to the Mozilla's Dark theme, but that's just a personal issue.