While implementing AudioWorklets, some code may have casted one type to another, invalid, dynamic type. This could have led to a potentially exploitable crash. This vulnerability affects Firefox < 111, Firefox ESR < 102.9, and Thunderbird < 102.9.
https://www.mozilla.org/security/advisories/mfsa2023-11/
https://www.mozilla.org/security/advisories/mfsa2023-10/