Windows 10 reached EOS (end of support) on October 14, 2025. For more information, see this article.

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What Windows 10 end of support means for Firefox users

What Windows 10 end of support means for Firefox users

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.

Troubleshoot time-related errors on secure websites

Troubleshoot time-related errors on secure websites

Learn why you might see time-related errors on HTTPS websites and how you can troubleshoot these errors by correcting your system clock.

Make Firefox your default browser on Windows

Make Firefox your default browser on Windows

Learn how to make Firefox your default Web browser on Windows 10 and Windows 11.

Fix error “Website will not allow Firefox to display the page.”

Fix error “Website will not allow Firefox to display the page.”

Learn why Firefox may block a page embedded by another site, and what you can do to open it.

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