Earlier quoted context omitted.
I assure you that a clean browser and IP will break any surveillance that I know about.
No, a clean browser and IP with the combination of what fonts I have installed, how my video card renders a canvas and WebGL instance (which may be affected not just by the video card you have, but the driver version used with it), my screen size, and a few other system level items that come through may or may or may not be enough to uniquely identify you. Along with linking to a prior profile if you screw up one tim…
My meatspace identity uses a desktop that hits the Internet directly. It displays no interest in technical matters. Just banking, cards, shopping, general news, etc. It never accesses HN, or any of the other sites that Mirimir uses. Or that any of my other personas use.
Mirimir uses a VM, on a different host machine, and hits the Internet through three VPNs, in a nested chain. Some other personas use different VMs on the same host, connecting through different nested VPN chains. Some are Whonix instances, connecting via Tor, and reaching Tor through nested VPN chains.
So basically, each persona that I want isolated uses a different host machine and/or VM, a different browser, and a different IP address.