Description
A race condition could have led to private browsing tabs being opened in normal browsing windows. This could have resulted in a potential privacy leak. This vulnerability was fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Mozilla Firefox
128.7 to ≤ 128.*unaffected135 to ≤ *unaffected
Mozilla Thunderbird
128.7 to ≤ 128.*unaffected135 to ≤ *unaffected
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1932555 ↗
- https://www.mozilla.org/security/advisories/mfsa2025-07/ ↗
- https://www.mozilla.org/security/advisories/mfsa2025-09/ ↗
- https://www.mozilla.org/security/advisories/mfsa2025-10/ ↗
- https://www.mozilla.org/security/advisories/mfsa2025-11/ ↗
- https://lists.debian.org/debian-lts-announce/2025/02/msg00006.html ↗