Very useful for flashing microcontrollers and devices without need of native apps. No installation, no drivers, works cross platform.
No doubt, but Google probably could've worked with Mozilla and Apple to figure out an approach that addressed their concerns instead of disregarding them and implementing it as-is.
Maybe I remember it wrong, but I think Mozilla said it is unacceptable in any form and they will not even consider it. I don't like the google way either, but Mozilla is stubborn here and Apple fights for control over app market.
So sad, if FirefoxOS still where a thing they wouldn't bat an eye.