greasemonkey

IMDB Age is a Greasemonkey script that I wrote to add age and other various info onto IMDB pages. Specifically it adds some details to actors or actresses pages. It adds their age, their Tropical Zodiac Sign and their Chinese Zodiac Sign.

Greasemonkey is a Firefox extension that lets you edit the DOM (ie the page) on the fly after the page is downloaded and parsed, but before it is rendered. Thus making it very easy to tweak pages slightly.