I think a nonintrusive banner can help if you want to, but you probably should not deliberately block anything. Depending what features you need, your web page

I think a nonintrusive banner can help if you want to, but you probably should not deliberately block anything. Depending what features you need, your web page might work fine with Lynx, and/or with other browsers. I personally prefer to encourage to disable JavaScripts, by adding a code such as: <script>document.write("<p>Note: JavaScripts is not needed for this web page.</p>");</script> While you can disable FLoC using a header, I have no intention to specify such things in my server. My opinion is that it is up to the user to configure the features that they want, not the web developer. So, I am not disabling it in this way. It is helpful to educate the user about it, though. (Many things cannot be controlled very well by the user, and some things are badly designed to support such a thing, so a better web browser should be needed to be written. With what my ideas are, using an existing engine probably is not suitable.)