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This page explains the error: "Website will not allow Firefox to display the page if another site has embedded it"
Firefox automatically updates itself by default, but you can always do a manual update. Learn how to update Firefox on Windows, Mac, or Linux.
Firefox will show you a "connection is not secure" warning message when a website login page is insecure and information could be stolen.
If a website requires a secure connection that cannot be established, Firefox will not connect and will show you an error page. Learn more.
