Adding a sign in button is simply:
This allows the user to log in and grant permission for your app to access LinkedIn.
Firefox Launcher For Android - Why?
Mozilla has an operating system for mobile devices but seemingly not content with this, it plans to build an app launcher for Android. The question is why exactly?
Bitcore For Developing Bitcoin Apps
Bitpay has launched Bitcore, a native interface to the Bitcoin network that provides the core functionality needed to develop apps for bitcoin.