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Firefox shows you a warning page about a potential security risk when you try to connect to a secure site but your connection is not secure.
If a website requires a secure connection that cannot be established, Firefox will not connect and will show you an error page. Learn more.
Learn why you might see time-related errors on HTTPS websites and how you can troubleshoot these errors by correcting your system clock.
Learn how to make Firefox your default Web browser on Windows 10 and Windows 11.