There should be a way to "identify" yourself agains sites you are visiting. Which do not left tracks in you computer, so when you visit another site with a Face

There should be a way to "identify" yourself agains sites you are visiting. Which do not left tracks in you computer, so when you visit another site with a Facebook/Google "goodie" they cannot identify you again. The problem is that cookies are in you computer, they should be ephemeral (you can do it, but is not standard). But then, yes, Facebook and Google and even Governments will try to know everything about you.