FireDiff - track changes to a page's DOM and CSS

Yeah, this is awesome if nothing else for giving me a tool to see what I've tweaked/played with when using the Firebug CSS editor to play with my site's styling. This should become a default addition to Firebug.

Can the editors add an apostrophe to "pages"? Apologies in advance for my insanity, but I really did trip over this headline and had to re-read.

This is fantastic. The only thing I'd like to see from this is optionally automatically store the changes across page loads, however not applying them unless a button is clicked.<p>The use case is those times when you have made the magical combination of css/dom changes to fix a bug and accidentally refresh the page, losing all that work. Just having the diff available after refresh would be great.

This is fully awesome, though I guess I should upgrade to Firebug 1.4. It doesn't seem to work on 1.3.3 at all (though I may be missing something). And I know it says it requires/recommends 1.4, I just thought I'd mention it for anyone running FB 1.3.3

Haven't tried it yet, but I would imagine those are some very expensive events to be observing for.

It's cool but I can't think of a case to use it for. What problem does this solve?