Provide references for CVE-2021-23987.
Where can I find more information about CVE-2021-23987?
References are available at: https://www.mozilla.org/security/advisories/mfsa2021-10/, https://www.mozilla.org/security/advisories/mfsa2021-12/, https://www.mozilla.org/security/advisories/mfsa2021-11/, https://bugzilla.mozilla.org/buglist.cgi?bug_id=1513519%2C1683439%2C1690169%2C1690718.