IonMonkey_extjs.js

if (Ext.firefoxVersion >= 18) {
    var noArgs = [];
    Ext.override(Ext.Base, {
        callParent : function(args) {


            var method, superMethod = (method = this.callParent.caller) &&
                    (method.$previous || ((method = method.$owner ?
                            method :
                            method.caller) && method.$owner.superclass[method.$name]));


            // Workarround for Firefox 18. I don't know why this works, but it does. Perhaps functions wich have
            // a try-catch block are handled differently
            try {
            } catch (e) {
            }


            return superMethod.apply(this, args || noArgs);
        }
    });
}