firefox is vulnerable to denial of service (DoS). The vulnerability exists through JavaScript Type confusion with NativeTypes.
access.redhat.com/errata/RHSA-2020:2382
access.redhat.com/security/updates/classification/#important
bugzilla.mozilla.org/show_bug.cgi?id=1639590
usn.ubuntu.com/4421-1/
www.mozilla.org/security/advisories/mfsa2020-20/
www.mozilla.org/security/advisories/mfsa2020-21/
www.mozilla.org/security/advisories/mfsa2020-22/