Now Facebook informs you if your friends are using mobile app or the web

Though it's not a ground-breaking feature, but it's pretty helpful that Facebook now lets you know whether the friends you're chatting with, are using the mobile app or the website. To the right of a user's name "web" or "mobile" will be displayed, letting you know whether or not a buddy is seated in front of their PC and ready to chat, or out and about firing off rather brief replies. People started noticing the new feature pop up yesterday, but now the social network has confirmed that it's rolling out the statuses globally. If you're not seeing it just yet, be patient. A few users are seeing the web/mobile messages on the site already.

via engadget