> While you should be able to install just about any Ubuntu app by opening a terminal and using apt-get

Between that, and what I presume is the lack of the A/B active partition update strategy, I think it's not an apples to apples comparison to the goals that Chrome OS strives toward

I actually would enjoy seeing a real Chrome OS competitor, and I think the architecture of Firefox could make it easier to have "privileged" extensions, or at least it used to back when they had XUL - perhaps all that privilege boundary has been removed now