Mozilla rips off Metalab, issue apparently resolved within the hour
I think this is a gross, misleading, and irresponsible reaction. The cited image is from the Mozilla wiki under a section entitled "Current mock-ups and screenshots". I cannot find any evidence that Mozilla has released a site or application with this UI. There is nothing anywhere to indicate that the design shown is "new", that it is in any way intended to be the final design, or that the stolen graphical elements will actually be used in the real product.