hello nicholas, all those settings and login states are usually stored in cookies. have you set-up firefox to keep cookies across sessions and not to clear this kind of private data once you close firefox? in addition make sure that you don't use an external security or clean-up tool that might interfere with the cookie management in firefox.

Cookies - Information that websites store on your computer

You have accidentally told Firefox not to remember cookies, or to refuse them.

Cookies are small text files that websites use to store information used by them, such as your session ID (so you can "remember" sessions), a tracking ID (used by ad platforms to offer you personalised advertisements), or simply few preferences websites have.

This cookies are sometimes abusive (for example, the tracking IDs), so some users may want to disable them.

In order to tell Firefox to allow cookies again, go to Firefox/Options (Edit/Preferences), privacy tab and choose Firefox will: "Remember history" in the combo box.

If you tried to disable browser history, that's the reason for which you have this problem. In that case you want firefox not to remember your browsing history, choose Firefox will: "Use custom settings for history" and uncheck "Always use private browsing mode" and "Clear history when Firefox closes" and check the "Accept cookies from websites" checkbox.