Self-Destructing Cookies
Fix the web. Gets rid of a site's cookies and LocalStorage as soon as you close its tabs. Protects against trackers and zombie-cookies. Trustworthy services can be whitelisted.
Auto delete cookies, localStorage and IndexedDB objects as soon as they become unused.
Cookies Exterminator automatically erases cookies, localStorage and IndexedDB objects when they are no longer used by open browser tabs. You don't need to use any blacklists and be concerned about how they are up to date the unwanted data will be removed on the fly. This will help to defend browser from the most known tracking techniques used on the web and to increase privacy.
Firefox extension Privacy protection
firefox-extension privacy-protection internet-security cookies cookie-preferences cookie-manager