On December 1, 2021, Mozilla released a security patch that addressed a flaw in one of its products. It is strongly advised that you take the required safeguards by keeping your products up to date.
For more information on this update, you can follow this URL:
https://www.mozilla.org/en-US/security/advisories/mfsa2021-51/
The Guyana National CIRT recommends that users and administrators review this update and apply it where necessary.
PDF Download: Mozilla Security Advisory.pdf
References
https://thehackernews.com/2021/12/critical-bug-in-mozillas-nss-crypto.html