Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Featured Articles

Customizing Firefox Using policies.json

Customizing Firefox Using policies.json

Cross-platform policy support can be implemented using a JSON file called policies.json.

Setting Up Certificate Authorities (CAs) in Firefox

Setting Up Certificate Authorities (CAs) in Firefox

Learn how to set up certificate authorities in Firefox Enterprise.

Firefox ESR release cycle

Firefox ESR release cycle

Firefox offers an Extended Support Release (ESR) based on a regular release of Firefox for desktop for use by organizations. Learn more.

Firefox Mac OS X 10.9, 10.10 and 10.11 users move to Extended Support Release

Firefox Mac OS X 10.9, 10.10 and 10.11 users move to Extended Support Release

Firefox 78 is the last supported version for Mac OS X 10.9, 10.10 and 10.11. Users will be moved to Firefox Extended Support Release (ESR).