I agree @snowmagician, it would be great to see an alternative to ChromeOS - a browser first OS ran by Mozilla would be awesome. There is another post like this here, if you want to kudos it for support.
Hmm I'm not sure of the value of this, Linux is already a solid platform with privacy/openness at its core.
There are already (arguably) too many distros out there, not to mention the different bases like CentOS, Debian. What's wrong with just running Firefox on Ubuntu for example?
If Firefox did a mobile OS (alternative to Android/iOS), man, I'd be all in!
I am the one who suggested the idea that @s1fly is introducing, but unfortunately I'm not confident that Mozilla will develop an OS today. They discuss but do not implement, and their principles and actions are becoming disconnected.
Does anyone remember FirefoxOS, it used a Linux Kernel. I have a phone here with it on. It was not what I would call very good, as syncing simple things like pictures from the camera never worked properly.