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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.
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 how to make Firefox your default Web browser on Windows 10 and Windows 11.
Learn why Firefox may block a page embedded by another site, and what you can do to open it.
