When I am using Facebook on my PC, on the chat bar I see last online time for some of my friends. But I don't see last seen for some of them. Why does this happen? Is it because the person has turned off chat for me or does the time appears of those who have Facebook in their phones? How do I keep others from seeing my last online time?
Why does Facebook show last login of some friends and doesn't show that in others?
facebook;facebook chat;facebook privacy