Click on 'Saved Logins.' button in 'Forms & Passwords' section. When you meet this situation, you are able to manually save your new password in Firefox. Sometimes there is no password update message after you've changed your password on Firefox. If you are looking for a solution, please follow this troubleshooting post and find the perfect solution for Firefox not saving passwords issue. However, some users reported that Firefox is not saving password after updating the system of their computer to Window 10 or Mac 10.13. Normally Firefox has the ability to automatically fills in the username and password to log you in the website that you logged in before. How do I prevent this? It never happens on the Win XP computer.'
'After updating to Win 10, Firefox periodically loses the Sync connection and it can't remember my password.
