Aha nice - Firebug Console API

The nice Firebug-Console-API api allows us to control the firebug output console and more direct from scripts.

Read more:
Debugging with Firebug an article by Andrew Dupont.

Favourite Firefox Plugins

1. firebug
2. web developer toolbar
3. html validator
4. venkman
   
5. devboi
6. Tab Mix Plus
7. Save Session

http://kb.mozillazine.org/Command_line_arguments