See also the original "Freedom to Tinker" article: "No boundaries: Exfiltration of personal data by session-replay scripts" https://freedom-to-tinker.com/2017/...n-of-personal-data-by-session-replay-scripts/ and the data in that article: "Data release: list of websites that have third-party "session replay" scripts" https://webtransparency.cs.princeton.edu/no_boundaries/session_replay_sites.html
Indeed, just blocking third party scripts should do. Just, well it is not as easy to do, it is a pain to setup and live with (virtually every webpage broken), but that is the price for the privacy.
They must be Javascript scripts, so any add-on blocking scripts would be effective, but not easy to live with. Ad-block probably would block some, but you don't have assurence that it would block every one of them.
Ummm, maybe don't type what you don't want known? Or, anyway, if it can be linked to you. Compartmentalize!
Time to implement my sooper special Rule QQQQ (tm JoWazzoo) I guess. But I can see cases where I DO want to enter a form for some purpose. If blocked by one of my Rules (e.g. QQQQ) the form does not get submitted. On the other hand, if I knew ahead of time my form data WILL be scarfed by a third party in the form of key logging .... well ..... what to do? I don't want that to happen. Who would? I do not think that Don't type is the answer. The answer is in fact that for privacy reasons FEW, if any, users would knowingly allow this. Nor expect this. I am NOT a lawyer (thank God) but this has to be illegal.
I did some searching and found the answer for Firefox 57 (quantum users) as there is protection built in already that they developed in the Tor browser. It is explained here https://www.bleepingcomputer.com/ne...-makes-it-into-firefox-first-party-isolation/ I have now turned this on and not had any problem with logging into any sites. Together with Ghostery, I am hopeful that there is more protection Also, in early 2018 they are implementing a block for canvas fingerprinting on version 58, another step in the right direction