Can you explain the problem better?

This can be caused by corrupted cookies or cookies that are blocked (check the permissions on the about:permissions page). *https://support.mozilla.org/kb/fix-login-issues-on-websites-require-passwords In case you are using "Clear history when Firefox closes": *do not clear the Cookies *do not clear the Site Preferences *Tools > Options > Privacy > Firefox will: "Use custom settings for history": [X] "Clear history when Firefox closes" > Settings *https://support.mozilla.org/kb/Clear+Recent+History Note that clearing "Site Preferences" clears all exceptions for cookies, images, pop-up windows, software installation, and passwords. Clearing cookies will remove all specified (selected) cookies including cookies with an allow exception that you want to keep.