Provide references for CVE-2021-29951.
Where can I find more information about CVE-2021-29951?
References are available at: https://www.mozilla.org/security/advisories/mfsa2021-10/, https://www.mozilla.org/security/advisories/mfsa2021-18/, https://www.mozilla.org/security/advisories/mfsa2021-19/, https://bugzilla.mozilla.org/show_bug.cgi?id=1690062.