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

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Captive portal detection

Captive portal detection

Description of how Firefox detects captive portal networks.

Manage Firefox profiles

Manage Firefox profiles

Learn about the new Firefox profile manager and how to create, customize, manage and switch profiles that you use for different purposes.

Secure connection and security warning error pages in Firefox

Secure connection and security warning error pages in Firefox

If a website requires a secure connection that cannot be established, Firefox will not connect and will show you an error page. Learn more.

Change Firefox options, preferences and settings

Change Firefox options, preferences and settings

Learn how to access and adjust Firefox settings, including privacy, startup behavior, downloads and more.

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