firebug 扩展介绍和下载

https://getfirebug.com/wiki/index.php/Firebug_Extensions#Firecookie
https://addons.mozilla.org/zh-CN/firefox/addon/firequery/
支持jquery
https://addons.mozilla.org/firefox/addon/firelogger/
支持 php python
https://addons.mozilla.org/zh-CN/firefox/addon/illuminations-for-developers/
Some support for Dojo 1.5+, SproutCore, YUI2, YUI3, Closure Lib, qooXdoo, jQuery UI, EmberJS, BackboneJS (including StackMob and Parse), Uki, Eny

LiveCoder

LiveCoder lets you poke at the browser's DOM, just like Firebug. But LiveCoder also lets you examine Firebug itself. In addition to examining the DOM, you can alter it including changing functions. This is a great way to debug your code and test fixes more
quickly.

Visit website

Download. [getlivecoder.com] (experimental)

Author: Steve Souders.