Facebook grey symbol

[David444]

Just out of curiosity, in facebook, when someone is on I know I see the mobile or web with a green dot. But I don't see it for everybody. For some I see a little grey symbol, and sometimes It will say "10m", next to it. What does that mean?

 

[nukemaster]

Not a facebook user, but

A. This is the cpu section.
B. My guess would mean they have been offline or idle for 10 minutes.