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Firefox issues an insecure password warning when a web page's login form is not secure and your information could be stolen.
Enhanced Tracking Protection in Firefox automatically protects your privacy while you browse.
If a website requires a secure connection that cannot be established, Firefox will not connect and will show you an error page. Learn more.
Firefox automatically updates itself by default, but you can always do a manual update. Learn how to update Firefox on Windows, Mac, or Linux.