CVE-2019-17010
Under certain conditions, when checking the Resist Fingerprinting preference during device orientation checks, a race condition could have caused a use-after-free and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71. Date published : 2020-01-08 https://www.mozilla.org/security/advisories/mfsa2019-36/