I visit the site example.com creates links to cookies at pippo.com
I visit the site mozilla.com creates links to cookies at pippo.com
firefox create all cookies, all data cache, per visisted site, this create a muliple cookies of pippo.com.
one single visited site is a new profile, new all cookes, new fingerprint, new isolated cache
i visit the pippo.com the pippo not have a access a example.com created cookies or script, only pippo.com created cookies
pro not tracking user in web
contro high space cache usage