Abstract: Described herein are a web-based interest matching, discovery, communication, and collaboration system and related features. The interest matching, discovery, communication, and collaboration system provides a browser add-on, an extension, a plugin and/or web site that may be used by one or more users. Via the browser add-on, extension, plugin and/or search page, a user can perform searches from multiple different Internet search engines, social networking sites, online newspapers, online magazines, content sites, eCommerce sites, libraries (as an example, university libraries), and/or databases. When the user performs a search, the interest matching, discovery, communication, and collaboration system stores information about the search including, for example, terms that the user searched for on the web-site searched and the URL, and provides information to the user that allows the user to connect to and collaborate with other users who have searched for the same or similar user inputs or search strings.