On the Firefox Future Releases blog today, Johnathan Nightingale (VP Firefox) announced that Mozilla has decided that adopting Firefox for ‘Metro’ is not a battle worth fighting. The main reason is the overall lack of interest in having a ‘Metro’ version of Firefox. In late 2012, when I started up the Firefox for Metro team (I know that’s not what Microsoft calls it anymore, but it remains how we talk about it in Mozilla), it looked like the next battleground for the Web. Windows is a massive ecosystem and Microsoft pushes its new platforms hard. At first, it looked like…