A client application of a device receives presence information and other interaction information from other devices synchronized to a set of content items. The interaction information indicates interactions of at least one other device with respect to a synchronized content item. The client application displays a browser depicting the synchronized content items and permitting navigation among organizational elements. The browser also displays the interaction information associated with the content items received from the other devices. The browser displays the interaction information with respect to particular content items or for an organizational element. The browser may also include an activity feed displaying interaction information specific to a content item or relating to a synchronized folder or organizational element. This permits a user to view, at a browser, activity and interactions of other users with respect to content items using native applications on another device.