If you do not want to see the facebook widget slowing up your loading times, I got the solution:

You need Firefox and Adblock Plus Plugin for Firefox (google them if you don't have it.

After installing the Adblock Plus Plugin, click on the arrow of ABP logo on your top right corner. Open blockable items, then in the search bar type in facebook. Click on the first, right click and click on block this item. But use a custom rule:

*facebook*

That's all you need!