ZTE open phone – upgrading to firefoxOS 1.1 / 1.3 how to

If you read my previous post about the ZTE Overview, you know I was planning to upgrade my phone to version 1.1 after finding instructions on MDN I thought its going to be easy, but apparently its not as straight forward as one might think. This guide is basically going to organize the information on how to build updated version of firefox OS and Install it on the ZTE Open