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Learn how Firefox will continue supporting Windows 10 after Microsoft ends its updates, and discover the steps Mozilla recommends to keep your browsing experience secure.
Firefox will show you a "connection is not secure" warning message when a website login page is insecure and information could be stolen.
Learn how to activate and use the built-in VPN feature in Firefox to protect your browsing.
If you can't connect to a website, you may see the Server Not Found error message. Learn how to troubleshoot and fix this error.
