This extension searches current page for links to mp3s, and adds the 'download' attributeThis extension searches the current page for links to mp3 files. When it finds them, it sets the 'download' attribute. That way, when the link is clicked, the file downloads rather than plays. This saves the effort of right-clicking and selecting "Save link as...".
Also, when the extension icon is clicked, the popup lists all of the mp3 links found as download links. That way, if the link is embedded in an "audio" tag, you can still download the file.