HN always seem quick to jump on the whole "Firefox is dying" meme, but Firefox still seems to to have about 20% market share in most usage reports I've seen[3][4]. I think it's great to see the Mozilla Foundation continue to standup for their principles.
[1] http://www.gartner.com/newsroom/id/2335616
[2] http://www.mozilla.org/en-US/firefox/partners/
[3] http://arstechnica.com/information-technology/2013/03/chrome...
Not all mobile computing devices are smartphones. If you add tablets and PMPs to the mix, iOS has quite a presence.
"Firefox still seems to to have about 20% market share"
If 20% is enough to be called a major player (and I think it does), then surely you agree it's hard to ignore iOS.
I would say it is very easy to ignore iOS when you basically can not put your product on it.
We have to remember that Mozilla is a non-profit foundation with a specific manifesto[1] that espouses principles directly in opposition to the closed nature of Apple's App Store. Chrome on the App Store is a different beast than Firefox would be.
Google's primary mission, all the 'Don't be evil' stuff not withstanding, is to make money, so they need to go where users are. Mozilla's goal is to help build a free and open Internet to create choice for users, and a skinned UIWebKitView isn't real choice for users.