You're serious?! You are using Open Source and free software only to hand over all of your data in the blink of an eye to Facebook?!
Somehow people need to understand that the monolith of Facebook needs to be stopped; they are literary in the smallest veins of the internet, surveilling and controlling it's pulse.
By installing this plugin you are helping Facebook in their aim to become the one-stop-shop for info and content on the internet. And what do you get in return? A few extra 'likes'?
Please keep the web Open and Free and use Open Source and Libre Software.