The social network asked the removal of the extension because it violates its terms.
Specifically, Unfriend Finder injects unauthorized code into the social networks's source code in order to alter the way that the webpages are rendered in users browsers
It adds unauthorized links to users' bookmark sections;
And posts unauthorized notifications regarding which users have "unfriended" the user or "ignored" his or her friend requests.
I cannot enforce this and will cease the developement of this Extension.
Unfriend Finder has been around for 3 years, and many of you enjoyed this, but it cannot go further.
Thank you for your support.