Then you need to go through these Firefox help to on what Autofill is and isn't. https://support.mozilla.org/en-US/kb/autofill-logins-firefox https://support.mozilla.org/en-US/kb/logins-sync-autofill-saving-firefox-preview https://support.mozilla.org/en-US/kb/password-manager-remember-delete-edit-logins

You do not see this section in "Settings -> Privacy & Security"? Are any <b>pref.privacy.disable_button</b> prefs set to true in about:config? *https://support.mozilla.org/en-US/kb/about-config-editor-firefox Can you open about:logins via the address bar? *https://support.mozilla.org/en-US/kb/password-manager-remember-delete-edit-logins ----- 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