Usually, facebook does not enjoy this kind of extensions.
Facebook required "Social Fixer" extension to remove its key features
<a href="http://socialfixer.com/blog/2013/10/05/facebook-requires-social-fixer-browser-extension-to-remove-key-features/" rel="nofollow">http://socialfixer.com/blog/2013/10/05/facebook-requires-soc...</a>