First you have to export the logins on your computer. You do that from Passwords in the 3 bar menu. You need to copy that file to your mother's computer. https://support.mozilla.org/en-US/kb/export-login-data-firefox On your mother's computer, import the logins. To enable importing, enter about:config in the address bar and change the following preference to true. You may have to restart the browser. The option to import will then appear when you click the 3 dots top right of Passwords. ''signon.management.page.fileImport.enabled'' https://support.mozilla.org/en-US/kb/about-config-editor-firefox