If an extension supports user-defined rules, rules lists could be crowdsourced and/or delegated to dynamic lists downloaded from a server (like uBlock Origin).

If an extension supports user-defined rules, rules lists could be crowdsourced and/or delegated to dynamic lists downloaded from a server (like uBlock Origin). The “I don’t care about cookies” extension is a good example: https://addons.mozilla.org/en-US/firefox/addon/i-dont-care-about-cookies/ https://addons.mozilla.org/en-US/firefox/addon/i-dont-care-a... . The extension even has UI for users to report websites whose cookie popup are not known by the extension. The first step might be creating a shared JS library for generic remote list management (periodically checking for updates, downloading lists, managing local list versioning) that extension developers can use in their extensions.