How to prevent cookies from a specific site from being deleted when clearing or deleting cookies in Firefox?

Question

JavaScript

A solution for other browsers will also be interesting.

Answer 1

There is a speech about hard removal through the functionality of the browser, then of course not. That's what he needs to clean everything up.
Bypass only writing to local storage/indexed db or something else. But they are probably also cleaned by the browser in some cases of complete cleaning.

Answer 2

monitor document.cookie via setInterval

Answer 3

Deleting the cookie file from the profile folder will kill all your "protection" nafig :)