The other way is with the Multi Account Containers, Temporary Containers, and Containerize addons. Make permanent containers for sites where you want to allow c

The other way is with the Multi Account Containers, Temporary Containers, and Containerize addons. Make permanent containers for sites where you want to allow cookies to be saved. Let everything else open in temporary containers. Shortly after closing the temporary tab, all cookies (and local storage, etc) for that tab get deleted. Permanent containers keep their data. Containerize lets you add matching rules to URLs without having to visit that URL in a GUI. Handy for redirects.