Description
A flaw in handling fullscreen transitions may have inadvertently caused the application to become stuck in fullscreen mode when a modal dialog was opened during the transition. This issue left users unable to exit fullscreen mode using standard actions like pressing "Esc" or accessing right-click menus, resulting in a disrupted browsing experience until the browser is restarted. *This bug only affects the application when running on macOS. Other operating systems are unaffected.* This vulnerability affects Firefox < 133, Firefox ESR < 128.5, Thunderbird < 133, and Thunderbird < 128.5.
Metrics
CVSS 3.1 9.8/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HAffected software
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | >= unspecified, < 133 |
| Mozilla | Firefox ESR | >= unspecified, < 128.5 |
| Mozilla | Thunderbird | >= unspecified, < 133 |
| Mozilla | Thunderbird | >= unspecified, < 128.5 |
| mozilla | firefox | < 133 |
| mozilla | firefox_esr | < 128.5 |
| mozilla | thunderbird | < 133; < 128.5 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1916152Issue Tracking
- https://www.mozilla.org/security/advisories/mfsa2024-63/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2024-64/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2024-67/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2024-68/Vendor Advisory
Timeline
- Published
- Nov 26, 2024
- Last modified
- Jun 17, 2026
- NVD status
- Analyzed