By Alexei Oreskovic SAN FRANCISCO (Reuters) – Facebook Inc will add technology to its mobile apps that recognizes the music, movies or television shows its users are enjoying, in the companys latest move to give prominence to media and entertainment on its social network. The new feature, which must be activated by the user and is off by default, would create a status update on Facebook that identifies the song a user is listening to and provide a 30-second preview of it thats available to the users friends. Facebook, which announced the move in a post on its official blog on Wednesday, is working with streaming music services Spotify, Rdio and Deezer to offer the music previews. If a television show is detected, Facebook would highlight the specific season and episode that the user is watching and share it in their news feed.