blackr is a bookmarklet you can put in your browser's bookmarks bar. Later, when you are on a photo page or one of the "All sizes" pages on flickr, you can click the bookmarklet and it will hide everything on the page behind a soothing black canvas except for the photo. All that remains is the picture. Optionally you get a white border around the photo.
Bookmarklet Source Code:
javascript%3Afunction%2520fnStartBlackr%28sUrl%29%2520%7Bvar%2520nScript%2520%3D%2520document.createElement%28%27script%27%29%3BnScript.setAttribute%28%27language%27%2C%27JavaScript%27%29%3BnScript.setAttribute%28%27src%27%2CsUrl%29%3Bdocument.body.appendChild%28nScript%29%3B%7D%2520var%2520blackrF%3D0%3BfnStartBlackr%28%27http%3A//blackr.net/1.0/blackr.js%27%29%3B
