javascript - Right way to detect firebug on the client side when firebug is activated on a webpage

Question

Possible Duplicate:
Javascript that detects Firebug?

I tried the following code which did not work.

if(window.console && window.console.firebug)
{
 alert("Firebug active!");
}

What is the right way to detect firebug on the client side when firebug is activated on a webpage using JavaScript or JQuery.