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Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

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Security

Keep yourself secure online.

Katika Kiingereza

Troubleshoot network errors when TLS key logging is enabled

Use built-in VPN in Firefox

Control personal device and local network permissions in Firefox

Firefox Password Manager - Alerts for breached websites

Firefox security features warning on Linux

Use breach alerts in Firefox

Unable to find the built-in VPN in Firefox

Block and unblock websites with parental controls on Firefox

Certificate contains the same serial number as another certificate

Suspicious activity on my Mozilla account

Recommended Firefox privacy and security settings for families

Sign in to a Mozilla account using 3rd-party authentication

Data Loss Prevention

Compatibility with Exploit protection on Windows

Understand unexpected script warnings in Firefox

Harmful add-on protection

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