My problem with click to play — which I used for a few years on Safari, Chrome, and Firefox, with extensions before it was built-in — is that your browser still

My problem with click to play — which I used for a few years on Safari, Chrome, and Firefox, with extensions before it was built-in — is that your browser still reports to the website that you have Flash installed. At this point, most sites work without Flash, but only if the site thinks you don't have it. (Or, like Youtube, by requesting the HTML5 player in a setting.)