It's one cat and millions of mice that multiply rapidly. Ads networks that use random unpredictable domains are intractable by the static blacklist approach. Not only that: ads networks can watch the public blacklist and adjust their domains accordingly. If declarative API was about security, Apple would rather block network access for adblockers.

Agreed about Firefox. My goal here is to call out the hypocrisy of the declarative API. So I want to repeat myself that the declarative API is about giving ads networks an easy way to not get blocked, while using performance and security as false arguments that impress only those who know nothing about performance and security.