I don't recommend it as a comprehensive solution because it misses some stuff, such as indexeddb and service workers. For maximum isolation you'd want temporary containers.
[1] https://github.com/Cookie-AutoDelete/Cookie-AutoDelete/wiki/... [2] https://github.com/Cookie-AutoDelete/Cookie-AutoDelete/wiki/...
>The API for browsing data cleaning doesn't appear to support Firefox Containers. So if cookies from one container are cleared, then all of that site's data from all containers are deleted regardless of rules.