I assume you mean you have disabled the Firefox Password Manager. *Settings -> Privacy & Security -> Logins and Passwords -> [] "Ask to save Logins and Passwords for websites" Is this data present on the about:logins page ? It is possible that this data is saved as part of saved form data if you have this enabled. *Settings -> Privacy & Security<br>Firefox will: "Use custom settings for history": "Remember search and form history" *https://support.mozilla.org/en-US/kb/control-whether-firefox-automatically-fills-forms ---- Suggestions in a login drop-down list 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 list 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

To hard. Better going back to Edge............