Here's a thing about LLMs, they will effectively make laws like this meaningless. Law comes in to enforce against a company building a program to block ads, extension goes off market. Someone asks their LLM "create an extension function referencing the same data set for my browser that performs the same function" boom new extension with no central point of distribution. Share the prompt on a forum, now everyone has a custom ad blocker. Or not so far down the road, LLM is directly built into the browser, no extension needed just prompt "do not display known advertisements on pages I request before loading, but perform background activity which gives feedback to the site that ads have loaded" boom done.

In a way, local LLMs are like distributed applications, they make enforcement against specific program functions pretty much impossible.