warp

warp at

My experience has been similar.  My phone came with Firefox OS 1.0, which I updated to 1.1 using the ZTE provided firmware image.  I haven't been able to update to anything newer.

Firefox OS still seems promising to me, but 1.1 certainly isn't mature, and the device seems way too under-powered. I still use it as my main phone, but it's a frustrating experience.