hello, firefox won't save your passwords when you've set it up to run in permanent private browsing mode ("never remember history" in the options > privacy panel). [[Settings for privacy, browsing history and do-not-track]] please also [https://www.mozilla.org/firefox/update/ update firefox to the latest version] as soon as possible - you are using an outdated version [https://www.mozilla.org/security/known-vulnerabilities/firefox.html affected by numerous known security vulnerabilities] which will put the integrity of your system and your personal data at risk!