Don't expect CM13 for this device, cm12.1 is already full of bugs and the developer *poof*, disappeared
Firefox OS is a dead OS, it's been some time already, and Ubuntu Touch? I never saw anyone using it, you may get more info on Ubuntu website.
I'd love to see CM13 for this device. And I believe it should not be harder that CM12/12.1Karthick, Leonnard, and the others are still alive! Of course it has bugs, but the roms are very good! Dont say that!!! We still have hope. I know some are disappearing but I know We must not lose hope!!!.
Please... I know someonses still there. If i only know to buildone then I have done it before...but I don't many are still waiting. We must have that CM13. Just give it a try bro.!!!