> What is a static filter list other than a list of filters that does not change? A request is being made. At the time of the request, you go through a list of

> What is a static filter list other than a list of filters that does not change? A request is being made. At the time of the request, you go through a list of rules and decide if you're going to block or allow it. Once the request reaches the filter, you are working with a static list because you cannot make decisions using the content or circumstances of that particular request. You cannot add or remove anything to your list after looking at the request. A dynamic filter on the other hand could - Resolve hostnames with DNS to do CNAME uncloaking - Decode encoded requests so the website cannot send both real data and analytics/tracking data through a single URL. Being able to make dynamic decisions allows the ad blocker to inspect request headers and request bodies. - Modify responses. The web page could be getting ads from a JSON endpoint with the rest of the page. You can use filterResponseData and change the response dynamically to strip the ads return an empty JSON list for example.