The Mozilla Social for Android repo was archived (https://github.com/MozillaSocial/mozilla-social-android) and continuing as Firefly (https://github.com/Firefly-Social/Firefly)
The forked Ice Cubes app (https://github.com/MozillaSocial/IceCubesApp) also got archived. Mozilla Social for iOS (https://github.com/MozillaSocial/mozilla-social-ios) is not archived but seems inactive.