Provide references for CVE-2021-29964.
Where can I find more information about CVE-2021-29964?
References are available at: https://www.mozilla.org/security/advisories/mfsa2021-26/, https://www.mozilla.org/security/advisories/mfsa2021-24/, https://www.mozilla.org/security/advisories/mfsa2021-23/, https://bugzilla.mozilla.org/show_bug.cgi?id=1706501.