How to place Facebook chat on sidebar in MOzilla firefox

1)How to place Facebook chat on sidebar in MOzilla firefox
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Click on BOOKMARKS > ORGANIZE BOOKMARKS
Click on BOOKMARK MENU and then click on ORGANIZE >NEW BOOK MARK
a form will appear, now give this data,
Name: Facebook Chat
Location: http://www.facebook.com/presence/popout.php
and also CHECK (TICK) on LOAD THIS BOOK MARK IN THE SIDEBAR
now go to VIEW >SIDEBAR > BOOKMARKS> and now select facebook chat.
now you can see your facebook chat is appeared at the sidebar.