A dark theme similar to the Chrome incognito theme
This theme is no longer being updated for an alternative I recommend Fiddle N's incognito replica:
18-12-18 1.3 - Current - Updated colors to the redesign's new incognito style colors.
3-08-18 1.2.5 - Updated assets for the new Chrome redesign.
9-04-18 1.2.4 - Slightly increased brightness of active tab.