Addons » Web Development
Firebug, Added: August 18, 2008
Firebug integrates with Firefox to put a wealth of development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page...
Firebug 1.5 requires Firefox 3.5 or higher.
See also
FireXPath
July 15, 2010
FireXPath is a Firebug extension that adds a development tool to edit, inspect and generate XPath expressions.
Firediff
July 12, 2010
Track Changes in Firebug
TortoiseSVN Menu
July 06, 2010
Add TortoiseSVN commands to link context menus to allow easily browsing Subversion repositories. Must have TortoiseSVN already installed.
Firecookie
June 23, 2010
Firecookie is an extension for Firebug that makes possible to view and manage cookies in your browser
Library Detector
June 12, 2010
Detects what javascript libraries are being used on the current page and displays the result as icons with detailed tooltips in the statusbar.