Hi,

These are the basic Mozilla Firefox Plugins for web developers and for debugging HTML and JavaScript, recommended by MG:

• FireBug 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.
  
  
• HTML Validator HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla. The number of errors of a HTML page is seen on the form of an icon in the status bar when browsing.
  
  
• NoScript Allow active content to run only from sites you trust, and protect yourself against XSS and Clickjacking attacks.
  
  
• Web Developer The Web Developer extension adds a menu and a toolbar with various web developer tools.
  
  
• Save Complete Saves a webpage completely, providing a better alternative to the flawed built-in save functionality of Firefox.
  
  
• FireShot FireShot is a Firefox extension that creates screenshots of web pages (entirely or just visible part).
  
  
• ColorZilla Advanced Eyedropper, ColorPicker, Page Zoomer and other colorful goodies.

How to Screenshot an Entire Webpage on Mac or Windows

____________
Gabriel Anca

I use all, excepts:
 - Save Complete
 - FireShot

But I use:
 - FirePHP
 - AdBlock +
 - JavaScript Libraries Detector