Activate JavaScript console for Firefox

For whatever reason, the JavaScript console is not working for Magento by default. So if you try to output messages using console.log, nothing will happen. To change that, open js\varien\js.js and uncomment the following code:

if (!("console" in window) || !("firebug" in console))
{
    var names = ["log", "debug", "info", "warn", "error", "assert", "dir", "dirxml",
    "group", "groupEnd", "time", "timeEnd", "count", "trace", "profile", "profileEnd"];

    window.console = {};
    for (var i = 0; i < names.length; ++i)
        window.console[names[i]] = function() {}
}

if (!("console" in window) || !("firebug" in console))

{

var names = ["log", "debug", "info", "warn", "error", "assert", "dir", "dirxml",

"group", "groupEnd", "time", "timeEnd", "count", "trace", "profile", "profileEnd"];

window.console = {};

for (var i = 0; i < names.length; ++i)

window.console[names[i]] = function() {}

}

Activate JavaScript console for Firefox

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Keywords: Firebug JavaScript

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Activate JavaScript console for Firefox (Magento 1)