Abstract: A method and system for a new form of computer-implemented social network. Existing social networks limit users interactions to the context provided by social networking clients, and also limit discussions of content to short clips with links back to the original website. The presented method and system enable users to interact with each other within the context of a third-party web page. Users can mark up a third-party web page to leave each other notes, chat, or highlight text, all without requiring any modification to the server-side source code of the third-party web page.