Warn about any AJAX request made synchronously, while navigating within the application

findSyncRequests.js

(function () {
    var open = XMLHttpRequest.prototype.open;
    XMLHttpRequest.prototype.open = function () {
        var args = [].slice.call(arguments, 0);
        
        if (!args[2]) {
            console.error("Synchronous Request found!");
            console.trace();
        }

        return open.apply(this, args);
    };
}());