To all webmaster you have to install this small plugin in your firefox. It's very useful for all of you when you being developing, editing a web site. With this tools you can edit, replace or remove css code, change layout and many more with single click.

What is it ? This is FIREBUG one of the Firefox plugin for web developer. This plugin has so many features you can use that is :

 

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...

If you like it go HERE