Personally, I think choice is great. Why be upset when you can download chromium (it is supported by pretty much any platform FF is) and use it to do all sorts of stuff with WebUSB, if you are into that?
Still, I would like to see FF disable these features by default and allow opt-in. I don't see a great reason to avoid implementing them behind some "wall" (other than to avoid an increase in a concealed attack surface).
