The fr is a bookmarklet to help you to post your image on flickr to your blog. Tested on IE8, Firefox, Safari and Chrome.
Drag the link [fr] above onto your browser's bookmark toolbar, etc.
Access a flickr photo detail page, then click the bookmarklet. This shows an HTML source code which contains the image and links to the flickr page like below:
Flickr's new interface supported.
New version released which supports Picasa and any other photo sharing service.
*Original post written in Japanese.