An ex-mozillian said it best in: Mozilla’s Secret Browser, last week.
For an open company, this sure was hidden!
What I find funny is that he & I seem to read the same rands article (The Old Guard) and both come away with completely different impressions.
I guess when you work in a very open environment you tend to value openness. But I find it really hard to reconcile that with the proven output of skunkworks teams.
More details (or perhaps a better article link entirely): https://hacks.mozilla.org/2014/11/mozilla-introduces-the-first-browser-built-for-developers-firefox-developer-edition/