Ref# ADV2025_440 | Date: Dec 18th 2025

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Mozilla published security advisories to address vulnerability in the following product on December 15, 2025. It is recommended that you take these necessary precautions by ensuring your products are always updated. 

• Firefox for iOS – versions prior to 144.0 

For more information on these updates, you can follow these URLs:  

• Mozilla Foundation Security Advisory 2025-97 

• Mozilla Security Advisories 

 

The Guyana National CIRT recommends that users and administrators review these updates and apply them where necessary. 

References 

• Security Vulnerabilities fixed in Firefox for iOS 144.0. (n.d.). Mozilla. https://www.mozilla.org/en-US/security/advisories/mfsa2025-97/ 

• Mozilla Foundation Security Advisories. (n.d.). Mozilla. https://www.mozilla.org/en-US/security/advisories/ 

• Mozilla Security Advisory. (December 17th, 2025). Retrieved from Canadian Centre for Cyber Security. https://www.cyber.gc.ca/en/alerts-advisories/mozilla-security-advisory-av25-846