What I think is one thing that would be helpful is the ability to define unencrypted proxies for encrypted connections (which is especially useful if the proxy

What I think is one thing that would be helpful is the ability to define unencrypted proxies for encrypted connections (which is especially useful if the proxy is on the same computer), where the browser does not encrypt the request being sent to the proxy and does not expect an encrypted response; so that the encryption with the server will be handled by the proxy instead. This will save power, as well as allow blocking without needing to encrypt and decrypt the data twice.