Navigateur web de la fondation Mozilla.

http://getfirebug.com/logging.html

 // console.log, console.debug, console.info, console.warn, and console.error
 console.log("hello world")
 console.log(2,4,6,8,"foo",bar)
 console.log("%s is %d years old.", "Bob", 42)
 
 console.group("a title") // to start a new indentation block
 console.groupEnd() // , and then 

Object inspection
Calling console.dir(object) will log an interactive listing of an object's properties, like a miniature version of the DOM tab. Calling console.dirxml(element) on any HTML or XML element will print a lovely XML outline, like a miniature version of the HTML tab.

 console.dir( aObject )

Démarrer Firefox avec l'option -ProfileManager. FireFox.exe -ProfileManager

Utile pour ranger un profile ailleurs que dans “Documents & Settings”.