1. Facebook Toolbar  

This plugin allows you to interact with Facebook showing notifications and allowing share content, load images and update your status directly in your browser. And 'developed by Facebook and is also available for Internet Explorer.

2. FaceTweak – Facebook FX & Features 

Compilation many features for Facebook including: enlargement of the images on mouseover, emoticons, selection of all your friends and many more.

3. Facebook Translate 

Lets translate directly the state e in comments su Facebook.

4. LikeThePage  

Pluginfor Firefox that allows you to shareits Facebook simply the Pagine web you prefer and you can see how many people liked the web page you're visiting.

5. Facebook Application Bookmarks 

Adds one of the Favorites of Firefox app and games of Facebook.