You will need to install a user script manager extension to install this script.
Supports layers (e.g. county tax parcels, address points, etc) that are served by an ESRI ArcGIS server. Not all ArcGIS sites provide a public interface, and it may not be obvious that a site even uses ArcGIS. Feel free to ping me if you find a city/county/state site and would like me to look into whether or not it can be added.