The extension works perfectly. It failed to remove ads inserted on the page by another extension, but that isn't the fault of this app. The reason I've disabled it is that I like Facebook being free, therefore I accept the need for ads & sponsored content. FB gives me a lot of control over the messages delivered to me, and I think that's good enough.
If this extension offered options to remove only some kinds of content, I'd have given it the full five stars. (I realise this would be duplicating what I can already do through settings, just that it could be easier!) Cannot fault it for performance as promised, though. Nice work.