Make sure you do not run Firefox in permanent Private Browsing mode (Always use Private Browsing mode; Never Remember History). *https://support.mozilla.org/en-US/kb/private-browsing-use-firefox-without-history *https://support.mozilla.org/en-US/kb/common-myths-about-private-browsing *Options/Preferences -> Privacy & Security<br>Firefox will: "Use custom settings for history" *remove checkmark: [ ] "Always use Private Browsing mode" ----- A detail like a website remembering you (log you in automatically) is stored in a cookie, so you need to make sure to keep this cookie. You can use these steps to make a website recognize and remember you: *you can create an allow exception to keep cookies for specific websites. *Options/Preferences -> Privacy & Security<br>Cookies and Site Data: "Manage Permissions" , especially in case of secure websites and when cookies expire when Firefox is closed. *Options/Preferences -> Privacy & Security<br>Cookies and Site Data: "Manage Permissions" - - - - In case you use "Clear history when Firefox closes" or otherwise clear history. *do not clear the Cookies *do not clear the Site Preferences *Options/Preferences -> Privacy & Security<br>Firefox will: "Use custom settings for history":<br>[X] "Clear history when Firefox closes" -> Settings *https://support.mozilla.org/en-US/kb/delete-browsing-search-download-history-firefox *clearing "Site Preferences" clears exceptions for cookies, images, pop-up windows, and software installation and exception for password and other website specific data *clearing "Cookies" will remove all selected cookies including cookies with an allow exception you may want to keep