I don't know about you but I really like dark interfaces. Dark interfaces use less battery on AMOLED screens, reduce eye strain at night, and help protect you from shoulder surfers and nosy bar flies. Plus they just look good.
Which is why I was a bit miffed after installing ghacks-user.js to lock-down security in Firefox Quantum. I finished setup right before bed, opened the browser and – WHAM – my entire room illuminated with New Tab page: