Nice List. As a developer, I also use IE tab like Ici. Uses the IE render engine within firefox. Also a handy thing I use on firefox is a short bit of javascript to incriment the URL (for example: index1.php goes to index2.php etc.); if you save it as a javascript, you can drag it onto your tool bar, i've mirrored the javascript code on my site, at http://ninjadesigns.co.uk/increment_js.txt