The present invention is directed towards to computerized social networks and e-commerce and facilitating ad-hoc screen sharing and co-browsing between users of a social network. The collaborative browsing method comprises a server computer having a Shopping With A Friend (SWAF) server engine coupled to a database, a SWAF client engine coupled to the SWAF server engine and a plurality of client computers each having a web browser program that runs the SWAF client engine. The web browser program does not include a collaboration plug-in.