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DOM Inspector (DOMi) is a web developer tool created by Joe Hewitt and was originally included in Mozilla Application Suite as well as versions of Mozilla Firefox prior to Firefox 3. It is now included in Firefox, and SeaMonkey. Its main purpose is to inspect and edit the Document Object Model (DOM) tree of HTML and XML-based documents.
- Firebug, another web development extension more recently created by Joe Hewitt
- DOM Inspector extension for Firefox
- DOM Inspector at Mozilla Developer Center
- XPather - A DOMi extension that adds XPath support