Mozilla has decided that there is no demand and no point in building a browser for Microsoft’s Modern Design approach, formerly known as Metro.
The Metro interface is a key new component that Microsoft introduced to the desktop world when Windows 8 first hit the market in 2012. Metro offers the promise of a more tactile touch-friendly interface for Windows and it also requires that software vendors build Metro versions of their products. Among the many vendors that started to build Microsoft Metro applications in 2012 was Mozilla, though it’s an effort that never really matured.
In a blog post, Johnathan Nightingale VP of Firefox at Mozilla, wrote that Metro app adoption from his perspective has been flat.