What was the point of Firefox OS? I never really saw any kind of marketing around it beyond "Mozilla decided to make a phone OS." From what I've gleaned, the only differentiating factor was that all apps are Javascript. Like my mom cares what languages her apps are written in.
Of course the big difference is that Linux succeeded while Firefox OS failed. But thats after the fact.
I think something like Firefox OS is important, but probably wasnt something Mozilla should have undertaken when their key asset was under massive threat and it keeps dropping other stuff that, admittedly small numbers of people are using, were still successful in Theur niche and could have continued with minimal effort (examples of projects that affected me directly are Thunderbird and Prism).