Try the extension Cookie AutoDelete: https://addons.mozilla.org/en-US/firefox/addon/cookie-autodelete/ https://addons.mozilla.org/en-US/firefox/addon/cookie-aut

Try the extension Cookie AutoDelete: https://addons.mozilla.org/en-US/firefox/addon/cookie-autodelete/ https://addons.mozilla.org/en-US/firefox/addon/cookie-autode... It doesn't clear cache but it will automatically delete any cookies when you close a tab or when you change the domain. That might do what you need, when you use it in conjunction with Containers.