Мне показалось полезным одно маленькое добавление в user.js :
Код: user_pref("network.cookie.cookieBehavior", 1); // Only accept cookies from originating site
user_pref("network.cookie.warnAboutCookies", true); // Warn before accepting cookies
Код: user_pref("network.cookie.cookieBehavior", 1); // Only accept cookies from originating site
user_pref("network.cookie.warnAboutCookies", true); // Warn before accepting cookies