Firebug is a handy tool for web developers to use as they browse the internet. Among the things that you can do with this program are debug, edit, and monitor CSS, JavaScript, and HTML in whatever page or pages you wish. Screen shots are available at http://getfirebug.com, and there is a forum in which you can ask questions at https://groups.google.com/forum/#!forum/firebug. To let the developers know about a bug, you can go to http://code.google.com/p/fbug/issues/list.
A tool for web developers to edit and debug sites
