First of all you should try out Firebug 
1.12b5<https://addons.mozilla.org/firefox/downloads/file/223142/firebug-1.12.0b5-fx.xpi?src=google-groups>and
 check if the problem is still present.
If it's still there, could you please provide a test case, so we can 
reproduce that?

Sebastian

On Sunday, July 28, 2013 8:20:33 PM UTC+2, Fernando Ariel Niwes Naufal 
wrote:
>
> It is weird, I do not know how to describe my problem. Basically I have 
> the following code:
>
>     Tablero.prototype.getValor = function() {
>       if (!this.hayFichas()) {
>         console.trace();
>         throw "The deck is empty. It is illegal to call getValor()";
>       }
>       ...  more code ...
>     }
>
>
> The program works without trouble. But I keep seeing in Firebug's Console 
> the exception. (The deck is empty...)
> If I use Firefox's built-in  Developer Tools, or Chrome, there is never a 
> exception. It only appears on Firebug Console.
>
> I added a breakpoint over the exception and it never stops. It is like 
> never going that path. But still the exception appears.
> That code fragment is part of a more complex code, that uses Knockoutjs, 
> jQuery, SignalR, and I don't know what more.
>
> What I think is that Firefox have some kind of prediction algorithm that 
> execute that branch before time, and if it ever goes there it is already 
> processed. But as it never goes that branch... it is a exception that is 
> never thrown. Even worse.. the console.trace()  is never shown on console ! 
> As it was never executed.
>
> Am I right? Is it possible? Am I missing something?
> I am using Firefox 22.0 with Firebug 1.11.4
>
> It have no consequences on my application, but it is very annoying to 
> always see a exception that for all effects... do not exists.
>
>

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