Due to confusion processing a hyphen character in Date.parse(), a one-byte out of bounds read could have occurred, leading to potential information disclosure. This vulnerability affects Firefox < 78.
https://www.mozilla.org/security/advisories/mfsa2020-24/
https://security.gentoo.org/glsa/202007-10
https://bugzilla.mozilla.org/show_bug.cgi?id=1634738
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html