Malicious websites could have tricked users into accepting launching a program to handle an external URL protocol. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunderbird < 91.5.Referenceshttps://www.mozilla.org/security/advisories/mfsa2022-01/https://www.mozilla.org/security/advisories/mfsa2022-02/https://www.mozilla.org/security/advisories/mfsa2022-03/https://bugzilla.mozilla.org/show_bug.cgi?id=1744158
