1. Firebug Lite A must-have extension for many web developers, and for good reason, Firebug allows you to analyze network performance and activity, and edit, debug and monitor HTML, CSS and JavaScript live on any web page. It's not a substitute for Chrome Developer Tools, but works alongside it to allow you to debug with ease. Written in JavaScript, it is integrated into the toolbar and can be activated on a particular domain. It loads before all other scripts and is quick to load itself, as all code and images are stored in the extensions directory on ... Read More