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Featured Articles

Firefox Page Info window

Firefox Page Info window

The Firefox "Page Info" window gives you details about the page you're on. You can also use it to change permissions for the website.

How to troubleshoot security error codes on secure websites

How to troubleshoot security error codes on secure websites

Learn about the error codes SEC_ERROR_UNKNOWN_ISSUER MOZILLA_PKIX_ERROR_MITM_DETECTED and ERROR_SELF_SIGNED_CERT on HTTPS websites and how to troubleshoot.

Captive portal detection

Captive portal detection

Page that describes how Firefox detects captive portal networks.

Add-on Badges

Add-on Badges

You’ll know if an extension is being regularly reviewed if it has one of the badges listed in this article.

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