It's selective bias. I, like many other professional application and systems engineers who didn't originate in the web space, wouldn't participate in Mozilla, nor try to work there.

I'm just not interested in continuing to try fit the square peg of DOM/CSS/JS into the round hole being an application platform. It has been made clear from Brendan (for at least half a decade now, if memory serves) that this is what they're doing and will continue to do.

In the meantime, iOS and Android appeared from nowhere and turned the engineering departments of many companies -- most of which were previously focused solely on server+web -- on their head.

At the same time, Google can barely give Chrome Books away. This must tell you something about the efficacy of these strategies.