Mozilla Firefox 148 Security Advisory: Multiple High-Severity CVEs Fixed

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Security AdvisoryMozilla Foundation Security Advisory 2026-13HighMozilla

Affected:

Firefox
Firefox Focus for Android
Thunderbird

Fixed in:

Firefox 148
Thunderbird 148
Firefox ESR 140.8
Thunderbird ESR 140.8
Firefox ESR 115.3.3

Referenced CVEs: CVE-2026-2801 CVE-2026-2800 CVE-2026-2796 CVE-2026-2793 CVE-2026-2792 CVE-2026-2791 CVE-2026-2790 CVE-2026-2788 CVE-2026-2786 CVE-2026-2780

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