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The z-order of the browser windows could be manipulated to hide the fullscreen notification. This could potentially be leveraged to perform a spoofing attack. This vulnerability affects Firefox < 135 and Thunderbird < 135.
Reserved 2025-02-04 | Published 2025-02-04 | Updated 2025-02-05 | Assigner mozillaFullscreen notification not properly displayed
Irvan Kurniawan
bugzilla.mozilla.org/show_bug.cgi?id=1940162
www.mozilla.org/security/advisories/mfsa2025-07/
www.mozilla.org/security/advisories/mfsa2025-11/
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