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.
New to version 0.2, the ability to view the exact DOM and CSS state at any given time. This allows the developer to visualize all of the changes that have been made to the page, be it the current page state or any change in between.
Firediff requires Firebug 1.4. The recommended version is 1.4.0 or higher.