When reusing existing popups Firefox would have allowed them to cover the fullscreen notification UI, which could have enabled browser spoofing attacks. This vulnerability affects Thunderbird < 91.9, Firefox ESR < 91.9, and Firefox < 100.
CPE | Name | Operator | Version |
---|---|---|---|
firefox | lt | 100.0 | |
firefox_esr | lt | 91.9 | |
thunderbird | lt | 91.9 |