[michaelmrose]

It doesn't lock down the ability of extensions to inspect and spy on all your traffic just block it. This in and of itself demonstrates the purpose.

Also lets be real there are only a handful of adblocking extensions that have most of the market share run by legit players they could trivially vet and whitelist a small number of extensions that are allowed this privilege.

It's not about security its clearly about ruining adblocking. A tiny blocklist that can only be updated with the extensions ensures that it is always trivial to work around blockers. One can simply ask which which version of the extension one has and load ads from a url/host created since.