You click on someone online, you type, you enter.
There is no way to know who your friend is chatting with on Facebook unless the friend shares the information with you.
sharing photos/chatting
you dont
Yes
you cant
Chrome and Safari can be used for chatting. Chatting applications like Facebook and Google Talk can run on it.
it means IdleSo how can a person actively chatting be "idle"?
B)
just tell them with who
By pressing :D
Chatting with friends
You can't unless you are chatting with them. That is the only conversations you will see, the ones between you and them.