Facebook, Inc. has updated its Facebook app (free) to version 6.0. The new update adds chat heads to both the iPhone and iPad versions of the app — a “floating” head now enables users to quickly continue a chat with a friend while browsing other feeds. iPhone Facebook app users can send Emoji-style stickers within messages, and new feeds such as Music, Photos, and Games have been added. For the iPad app, the News Feed has been redesigned…
