List all non-standard properties on the window.

window.js

(function () {
    var results, currentWindow, typedResult

    iframe = document.createElement('iframe');
    iframe.style.display = 'none';
    document.body.appendChild(iframe);

    currentWindow = Object.keys(window);

    results = currentWindow.filter(function(prop) {
        return !iframe.contentWindow.hasOwnProperty(prop);
    });

    typedResult = {};
    results.forEach(key => {
        const keyType = typeof window[key];
        (typedResult[keyType] || (typedResult[keyType] = {}, typedResult[keyType]))[key] = window[key];
    });

    console.log(typedResult);
    document.body.removeChild(iframe);
}());