Firebug for Firefox
https://addons.mozilla.org/en-US/firefox/addon/1843
Anybody who does web design in any serious fashion knows about Firebug, THE ultimate plugin for the Firefox browser, now available for Firefox 3. Firebug is the ONE way to quickly and efficiently diagnose style, i.e. css issues with your website. Or, how I used it, with the integration of several different freeware scripts into one serious app.
You can use it in SO many different, wonderful ways. Create mockups of a live site on the Web that might not even be yours. Play with different styles to figure out just WHY it displays in a weird way on your screen. The one time it will NOT help you is when it looks OK in Firefox, but not in IE.
Yet, who cares? I owe this tool to a friend, and I’m eager to pass it on to you. Download it here.
