@bamboo Not sure if that's exactly what you mean but each site can set up the age verification by loading a script and adding event callbacks, like redirect_url to set an URL to be redirected to once the verification is over, and onclosed which occurs when the verification is successful, and where the site can set some code to run.

So if you just block the popup, it never appears and can never fire onclose and the code that happens after will never run.

Since sites are often minified and obfuscated, and the call for the popup can come from any file, I just replaced the response to requests to the popup URL, to have my own script that fires the event and/or redirects to the page, so that it works every time.

I think the only way to counter this is, if they change the URL (I can later update it too, or if a website hosts their own version of the file (so it will be at a different URL and be undetected). But all of these have easy workarounds as well.