Firebug not showing stack trace for errors?

I have noticed that even with "show stack trace with errors" enabled from the drop down, only errors that occur seem to have traces, but when I do: throw new Error('foo'); I do not see any stack trace for it even though it seems to appear in the console exactly the same way as other errors that occur such as iDoNotExist().

Is there something I am missing?

It also seems that I get the stack trace for calling conso开发者_运维百科le.error('foo');. Odd.

It should be noted that stack traces do occur on Webkit Inspector and Opera when doing throw new Error('foo');.

For others landing here :

The issue for me was showStackTrace is set to false by default for Firebug.

Here's how to enable it :

1. Goto about:config in Firefox

2. Change the value of the preference extensions.firebug.showStackTrace from false to true (Double-click toggles the value).

I tested this code in Firebug 1.7.1b2 (FF: 4.0.1, on win7) and it shows me stack trace:

function a(){
    throw new Error('s');
};

function b(){
    a()
}

b();

Have you tried:

var err = new Error();  
err.name = 'My custom error';
err.message = 'foo';  
throw(err);

Or even (doesn't always work):

throw 'foo';
throw('foo');