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Learn MoreIf 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.
Learn how to make Firefox your default Web browser on Windows 10 and Windows 11.
Firefox will show you a "connection is not secure" warning message when a website login page is insecure and information could be stolen.