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Editorial Team
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Asked: 2026-05-16T18:00:43+00:00

Okay, I have this weird problem in Firefox. I type in Firebug’s console $

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Okay, I have this weird problem in Firefox. I type in Firebug’s console

$ == jQuery

Sometime it displays true, and sometimes false. The file is just an empty HTML document with one script tag including jQuery. I refresh the page, click “Run” in the console, and again, occasionally it returns true, occasionally false.

On the occasions where it returns false, $.toString() gives

function anonymous() {
    return window.console.notifyFirebug(arguments, "$", "firebugExecuteCommand");
}

Now here’s the weird thing. When $ == jQuery gives false using Firebug’s console, if I go to the address bar and type javascript:alert($ == jQuery);, it alerts true!

Does anyone have any idea what’s going on here? It’s (occasionally) messing up my debugging.

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1 Answer

  1. Editorial Team

    There’s a native function defined by firebug that assigns $ to getElementById. I don’t think you can resolve this “bug” without upgrading to a newer version of Firebug which potentially eliminated the issue, or manually assign $ = jQuery.

    It’s probably come as a result of possibly jQuery already being cached and the Firebug $ overriding it as it fires too fast, or vice versa.. just some weird bug in regards to speed of assignment + caching.

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