Exactly what is says on the tin. You need to chose a location (such as the Bookmarks Toolbar, Bookmarks Menu, or any folder you created) from which the extension will read the bookmarks rather than cherry-picking certain ones. Easy work-around: create a folder with duplicates of only the desired bookmarks. This extension is a little gem hidden in the endless list of search results. Slick, easy to customize, no fuss, and regularly updated. Perfect, indeed.