Gotta agree with that.
Norton Privacy settings also cause problems with .htaccess anti-hotlink.
Even on the lowest privacy setting you'll just get image placeholders on a site which is hotlink protected coz the referrer info is blocked and the .htaccess won't allow the image to be served.
Just switch off "Privacy control" and "Ad blocking".
*Maybe* someone can tell us what (if any) referrer info Norton does provide, so it could be added to the list of valid referrers???