A type confusion vulnerability exists in Spidermonkey, which results in a non-exploitable crash. This vulnerability affects Firefox < 69 and Firefox ESR < 68.1.
https://www.mozilla.org/security/advisories/mfsa2019-26/
https://www.mozilla.org/security/advisories/mfsa2019-25/
https://bugzilla.mozilla.org/show_bug.cgi?id=1568397
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html