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The fullscreen notification is prematurely hidden when fullscreen is re-requested quickly by the user. This could have been leveraged to perform a potential 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 is not displayed when fullscreen is re-requested
Irvan Kurniawan
bugzilla.mozilla.org/show_bug.cgi?id=1910818
www.mozilla.org/security/advisories/mfsa2025-07/
www.mozilla.org/security/advisories/mfsa2025-11/
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