My understanding is that the best thing for internet privacy today is the TOR Project.

https://www.torproject.org/download/

What it does is bounce every request you make around 5 or more TOR servers, and finally it comes out on the other side.

It is NOT perfect, and the authorities, etc., have technology to fingerprint your browser, etc.

The authorities likely manage one or more TOR servers.

It's also slow, since it has to bounce your request around between multiple servers.

But, it is the best thing you can do when you are looking for internet privacy.