Socialbrowse is a browser extension that lets you easily share and discuss links in real time, and see what's good on every page. The sidebar shows a real time list of links shared by people you're following and the comments they've submitted. Any webpage you visit is re-rendered to show which links were shared by your friends. Requirements:

Ссылка: http://releases..b/mozilla.org/addons/8034/socialbrowse-0.7.0.1-fx.xpi