| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | < 128.5.0< 133.0 | 128.5.0133.0 |
| thunderbird | ≥ 129.0, < 133.0< 128.5.0 | 133.0128.5.0 |
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.
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