Open-Source Application Development :: add0n.com extension is a tool to combine segmented tracks in a single playable media file that can be used in any common media player. Since streaming media files takes some time until the most portion of the media is fetched by your browser, nowadays media providers usually prefer to split a single media file into segmented tracks. This way they can provide the first small segment and start the player right away without waiting for other segments to be ready. While the user is listening to this segment, the subsequent segments are being fetched and push to the player''s buffer. This is a really efficient method to listen to media tracks online however, there is a mess how to join these tracks together. The ''Audio Joiner'' extension aims to fix this problem by providing an intuitive UI for merging audio files with an optional user-defined delay.