Hello, To manage passwords, you can type in to your url bar '''about:logins''' There, you can delete, edit, and add saved logins

And for more background: [[Password Manager - Remember, delete and edit logins and passwords in Firefox]].

Suggestions in a login drop-down menu that have a key icon in front are login suggestions that you need to remove in the Password Manager. *https://support.mozilla.org/en-US/kb/password-manager-remember-delete-edit-logins Suggestions in a drop-down menu without a key symbol are autocomplete saved form data. Suggestions without a key icon are part of autocomplete saved form data that you should be able to remove by selecting this item with the cursor Down key and pressing Delete (Mac: Shift+Delete). *https://support.mozilla.org/en-US/kb/control-whether-firefox-automatically-fills-forms