This Proxy Service will not load flags=gated&https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,cancelAnimationFrame,Element.prototype.classList,URL,Element.prototype.placeholder,Object.defineProperty,Object.getOwnPropertyNames,Object.getOwnPropertyDescriptor,Object.getPrototypeOf,Array.prototype.findIndex,Array.prototype.find,Array.prototype.includes for you. Have the URL added to the whitelist, and do not use ajaxproxy for local, i.e. same server, requests.