Mozilla has released security updates to address security vulnerabilities in Firefox and Firefox for iOS. An attacker could exploit some of these vulnerabilities to trigger arbitrary code execution and sensitive information disclosure on the targeted system. Security vulnerabilities fixed in Firefox 143.0.3 and Firefox for iOS 143.1.

More information on vulnerabilities and updates is available in Mozilla security advisories:

• MFSA 2025-79

• MFSA 2025-80