クッキーで思い出したけどこんなのあった(´・ω・｀)

Cookie AutoDelete 1.4.4 Firefox 57 以上に対応
作者: Kenny Do
Control your cookies! This WebExtension is inspired by Self Destructing Cookies.
When a tab closes, any cookies not being used are automatically deleted.
Whitelist the ones you trust while deleting the rest. Support for Container Tabs (Firefox 53+).
https://addons.mozilla.org/ja/firefox/addon/cookie-autodelete/