If you've recently updated your Facebook Messenger smartphone app, you may have noticed something was different. Yep: Facebook has added some color to the long-standing white-and-blue Messenger logo.

To make its iPhone messaging app run better—especially on older phones—Facebook rewrote it from the ground up. The new version is going live now. Along the way, it supplemented its original text-based ...

Facebook has changed the way we read our private messages. Again. In the latest update sure to stir up the user base — even if it's just for a little while — the social network appears to have ditched ...