source: http://stackoverflow.com/questions/3124974/what-features-does-firebug-have-that-chromes-developer-tools-does-not-have I used Firebug from the start and it was a godsend like the invention of fire. But then Chrome came out with its debugger and I tried it. I kept using Firebug, but kept an eye on Chome's dev tools and finally could not longer come up with a reason not to switch after JSON tools were added in v12. Chrome's DevTools kick butt because it has: Built in Profiler and Heap analyzer Built in Audit tool Can access and edit LocalStorage, SessionStorage, Cookies, SqlLite DB's etc... WebSockets network sniffing SHIFT+ESC to get a detailed task manager of all Chrome processes and FPS of each page JSON and XML viewers are build in so you don't need a plugin to inspect responses JS Syntax highlighting is built right in, no need for a plugin JS debugger has many more features (WebWorker/XHR/DOM/Event breakpoints) JS debugger shows an element's...