As well as an ad-blocker, my system also uses a 'hosts' file that converts many notorious ad-site web-addresses to that of my own machine. It's practically a ce

As well as an ad-blocker, my system also uses a 'hosts' file that converts many notorious ad-site web-addresses to that of my own machine. It's practically a certainty that any page title requested from one of the ad-servers won't be found anywhere on my own web-server, so no ad from that ad-server ever gets displayed.