Firebug console stacktrace
===

How do I get a stack trace using Firebug's error console?

I've tried the following test:

    <!DOCTYPE html>
    <html>
    <head>
    
    <script type = "text/javascript">
    
    function f3() { console.trace(); }
    
    function f2() { f3(); }
    
    function f1() { f2(); }
    
    </script>
    
    <body onLoad = "f1()">
    </body>
    </html>

This test simply calls 3 different functions, create a stack 3 levels deep. The third function just prints out a stacktrace.  But, the Firebug console doesn't show anything:  

    [07:26:47.955] GET http://mydomain.com/test.html [HTTP/1.0 200 OK 23ms]

Is there something else I need to do to get a stacktrace working?