Firediff is a Firebug extension that tracks changes to a pages DOM and CSS. Firediff implements a change monitor that records all of the changes made by firebug and the application itself to CSS and the DOM. This provides insight into the functionality of the application as well as provide a record of the changes that were required to debug and tweak the page’s display.
Firediff requires Firebug 1.4. The recommended version is 1.4a17 or higher. Prior 1.4 versions might work, but functionality such as CSS change tracking will not work. Read the full article or download the source code.
