In facebook when someone is distracting your work by sending instant messages you have a option to be in invisible mode i.,e offline mode. so, that you won’t appear in other users facebook chat IM. If you are invisible facebook doesn't show you who the people are online. Really it’s a drawback. You can see the people online during invisible mode using a Greasmonkey script.
FBOnlineNow is the greasmonkey script which show you the current online users in facebook during invisible mode. Before installing this script you need to install greasmonkey add-on for firefox and in the chrome the script can be installed directly. After installing greasmonkey add-on go to this facebook application and install this to your facebook account.
Later install the FBOnlineNow script here by hitting the install button.
After install go to your facebook home page, open chat IM and go to offline from the options tab.
Next you see the window besides the chat IM displaying number of the people who are online, open the window by clicking it and you see the users who are online.
Also Read: 8 Useful Chrome Extensions for Facebook.
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