This is disingenuous. I assume you’re referring to the safe browsing service, which is run by Google and protects users from phishing and malware sites. In Fire

This is disingenuous. I assume you’re referring to the safe browsing service, which is run by Google and protects users from phishing and malware sites. In Firefox the requests made to Google's safe browsing are sent using a completely separate cookie jar that is isolated from the rest of the browser, so that even if Google is tracking the requests to its safe browsing service it wouldn't be able to identify you on the basis of the unique cookie alone. Of course if you’re still uncomfortable with this you can always turn it off. I don’t know where the claims for permanent cookies comes from. Cookies have expiration dates like all other browsers and can be cleared by the user. I in fact use an add on that clears cookies on tab close except for a set of whitelisted sites.