Then a couple of years ago, AJAX came along and every web development tool on the market became obsolete overnight. Today you can no longer rely strictly on tools that were designed for the creation of static pages. This is where Firebug comes in.
Firebug, an extension I wrote for the Firefox browser (www.mozilla.com), makes web development fun again. Combined with your favorite text editor, the freely available Firebug (www.joehewitt.com/software/firebug/) is a highly productive IDE for the complete stack of AJAX technologies.
Firebug's biggest draw is its convenience. As you browse with Firefox, you can open Firebug at any time to begin working on any page. Firebug appears either as a separate window or as a small panel at the bottom of your browser. Tabbed browsing and Firebug are best friends; each tab can hold a separate Firebug session, which always reflects the current page as you browse.