Computer-implemented methods for determining what to display to a user when the user opens a new web page browsing window in a web browser are provided. In one aspect, a method includes receiving a request to open a new web page browsing window, and providing the new web page browsing window for display, the new web page browsing window displaying, by default, either a collection of user selected web addresses or previously visited web pages. The method also includes receiving a request to display the collection that was not displayed by default in response to the request to open the new web page browsing window. The collection that was not displayed by default in response to the request to open the new web page browsing window becomes the default collection to display for a subsequent request. Systems, web browsers, and machine-readable media are also provided.