The Web Developer Extension is truly a great tool for web development. I have found the outline/forms/ruler to be extremely useful. It does have a lot of overl

The Web Developer Extension is truly a great tool for web development. I have found the outline/forms/ruler to be extremely useful. It does have a lot of overlap with Firebug though, and for stuff like (x)html/dom/js/css inspections I prefer to use Firebug than WDE...