What kind of use you have in mind will determine the answer.
It's a fantastic choice if you want to arrange and separate your personal and professional affairs.
However, it becomes unnecessary if you view it as a way to protect your privacy and security. Because Firefox already includes the TCP (Total Cookie Protection) built-in security feature, which the company claims is one of their most potent features to date. By automatically putting each website's cookie in its own container, this function keeps your browsing activities secret and secure by preventing websites from interfering with one another's cookie jar.