I like how CSS edit has a live preview which updates after you edit a CSS file. I've been doing similar with Firebug and tweaking CSS however that is only temporary. I usually edit files in Textmate than cmd+tab to the browser and cmd+r to refresh.
I was wondering if it would be possible to have Firefox watch CSS files in a document, and update the document when they get saved? This would mirror the CSS edit live preview functionality and eliminate the need for an extra app. Not sure how the plugin would have to work, this is just daydreaming.
Thanks a lot if you have any ideas