https://bugzilla.mozilla.org/show_bug.cgi?id=1538008
https://bugzilla.mozilla.org/show_bug.cgi?id=1538015
https://www.mozilla.org/security/advisories/mfsa2019-25/
https://www.mozilla.org/security/advisories/mfsa2019-26/
https://www.mozilla.org/security/advisories/mfsa2019-27/
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