Cannot check "Delete cookies and site data when Firefox is closed"

Hello, Until recently, I was able to have Firefox automatically clear all my cookies at the end of a session, EXCEPT for the cookies for websites that I had specified. This was possible by: * Checking the "Delete cookies and site data when Firefox is closed" option under `Privacy and Security > Cookies and Site Data` * Setting the websties that I would like to keep cookies for, under `Privacy and Security > Cookies and Site Data > Manage exceptions` Now, I simply can no longer use this feature. If I try checking the "Delete cookies and site data when Firefox is closed" option, then quitting Firefox, it seems to insist on unchecking the box, then changing another section of my privacy settings. Namely the `Privacy and Security > History > Clear history when Firefox closes` section becomes checked, and inside, `Cookies` is marked as something to be cleared at the end of each session. This is unhelpful, because checking the box here means that any exceptions I set in the aforementioned section is not respected, and ALL cookies are deleted. Am I doing something wrong? If there is a way to get it back to how it used to behave, that would be greatly appreciated. Thank you!