While Mozilla wants Firefox to be all things to all people, the browser has been noticeably missing from Apple's App Store. The software company put that down to the iPhone maker's software policy, namely that it'd have to use iOS' default browser engine instead of its own. Mozilla slowly came around to the idea and announced it would bring Firefox to iOS at the end of last year and now, after performing some localized testing in New Zealand, the browser is now finally available to iPhone, iPad and iPod Touch users.

http://www.engadget.com/2015/11/12/firefox-ios/