Mozilla has released security updates to address security vulnerabilities in Firefox, Firefox ESR and Thunderbird. An attacker could exploit some of these vulnerabilities to trigger arbitrary code execution on the targeted system. Security vulnerabilities fixed in Firefox 150.0.2, Firefox ESR 140.10.2, Firefox ESR 115.35.2, Thunderbird 150.0.2 and Thunderbird 140.10.2

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

• MFSA 2026-44

• MFSA 2026-43

• MFSA 2026-42

• MFSA 2026-41

• MFSA 2026-40