What it does?
Open the Neighbors Tab... And leave the Tab open. If there are any users with "Add X as Neighbor" option, this will add him/her.
How does it work?
Simple, Find the input button whose value start with "Add" and click on it. Then weight for the confirmation box to appear, and click on "Send"
How to Install?
(0) Install Greasemonkey Firefox Addon from here.
(1) Install The script from here.
Any suggestions and comments are welcome.