I heard about bricking phones by flashing Firefox OS on it. How safe is it to try to test it on new devices like e.g. HTC One (M8)? I don't want to brick my phone. :cyclops:
If there is a firefox os build for the HTC One M8 in the HTC One M8 forums then i would check the thread and if there aren't any builds in your device forums then you cannot flash anything until someone builds it.