Firebug - Tools for web development. Allows inspect, edit and monitor CSS, HTML, JavaScript and Net requests in any web page. Includes documentation, FAQs, videos and discussion groups. FirePHP - Allows to print to the Firebug Console using a simple PHP function call. Yahoo! YSlow for Firebug - Analyses web pages and suggests ways to improve their performance based on a set of rules for high performance web pages. Firecookie - Displays a list of cookies associated with domain of the currently displayed page. In Case of Stairs - Firebug - Contains Firefocus which helps visualize in the HTML tab, the focused elements. Page Speed - Evaluates the performance of web pages and get suggestions on how to improve them. Firepicker - Color picker plugin for style pane.