An issue with incorrect ownership model of "privateBrowsing" information exposed through developer tools. This can result in a non-exploitable crash when manually triggered during debugging. This vulnerability affects Firefox < 53.Referenceshttps://bugzilla.mozilla.org/show_bug.cgi?id=1329521https://www.mozilla.org/security/advisories/mfsa2017-10/http://www.securityfocus.com/bid/97940http://www.securitytracker.com/id/1038320