Here's how you can get 2-Click, a free Firefox extension that protects you from being tracked by like buttons on web sites.
1. Go to the 2-Click extension page.
2. Click the Download Now button.
Here's a description of 2-Click: "Are you worried about your privacy? Or just worried about page load times? This Add-On will convert the "Like" buttons of the major Social Networks to "2-Click Like" buttons and therefore protecting your privacy - since it's know they use it to track you..."
For more, see the original article at the link below.