1. A method for browsing media content and executing functions related to the media content by a browser device, comprising: displaying a collage image generated by combining a plurality of image elements corresponding respectively to a plurality of media contents; if a selection input is generated on the collage image, obtaining one or more elements of an image element and a text element corresponding to a location of a point where the selection input is generated; and configuring a preview window for a specific media content using the one or more elements to overlay the preview window on the collage image; wherein the text element corresponds to the specific media content and includes information about the specific media content.