IOSurf Firefox Browsing Plugin

IOSurf is a social web browsing plugin available for Firefox. ?It is a toolbar that allows users to see who else has been to a website that they are currently viewing. ?It is available for download at http://www.iosurf.com

Version 3.0 has just been released.
The 3.0 release has major enhancements from the older versions.
-New Asynchronous Presence System
-Popular

button showing what websites are visited most often
-Firefox and Flock integrationTechnorati

Watch this video it will be more clear to you: