Firefox 14: long description via link associated using aria-describedby

ARIA aria-describedby attribute used on HTML image element and pointing to HTML a element makes the image accessible to expose showlongdesc action. This action opens an URL provided by @href attribute on HTML a element in a new window.

source: http://asurkov.blogspot.co.uk/2012/05/firefox-14-whats-new-for-at-developers.html

Example:

Painting of a  young woman with long hair, sitting in a wooden boat.
A painting inspired by Alfred Tennyson's poem The Lady of Shalott.

Further information about the painting.

code:

<figure> <img src="shalott.jpg" aria-describedby="a" alt="Painting of a young woman with long hair, sitting in a wooden boat."> <figcaption>A painting inspired by Alfred Tennyson's poem The Lady of Shalott.</figcaption> <p><a id="a" href="http://www.tate.org.uk/art/artworks/waterhouse-the-lady-of-shalott-n01543/text-summary">Further information about the painting.</a></p> </figure>