get last active time
Damn look at screenshot
F.A.Q:
Q: How does it work?
A: Go to m.facebook.com, then go to chat of your friend, if they're offline you'll see last time in total days/hours/minutes/seconds.
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Q: Hey, it doesn't work on Desktop version, wth?
A: it's for m.facebook.com
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Q: Hey, it isn't refreshing
A: Why the hell you want me to crash your browser by implementing it?
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Q: Why does it print it in dev-tools@console?
A: Bcaus it can?
