SitePoint made an extension that does this years ago. It will try and scan your whole site too, making it a bit more useful than this: http://www.sitepoint.com/

SitePoint made an extension that does this years ago. It will try and scan your whole site too, making it a bit more useful than this: http://www.sitepoint.com/dustmeselectors/ http://www.sitepoint.com/dustmeselectors/