Windows apps · Mozilla

Mozilla Firefox ESR (lt) security updates

The latest version of Mozilla Firefox ESR (lt) is 153.7.0, released November 10, 2026. Patch Radar has 16 security fixes for Mozilla Firefox ESR (lt), closing 950 CVEs, 3 of which are being exploited. The newest security fix is Mozilla Firefox ESR (lt) 153.7.0, released November 10, 2026.

3 exploited CVEs
Latest version
153.7.0
Released Nov 10, 2026
Security fixes
16
On record in Patch Radar
CVEs
950
Closed by those fixes
Exploited
3
Vendor report or CISA KEV

Security fixes, newest first

PriorityFixFixed inCVEsExploitedReleased
Urgent Mozilla Firefox ESR (lt) 153.7.0153.7.0 47 Nov 10, 2026
Urgent Mozilla Firefox ESR (lt) 153.4.0153.4.0 59 Sep 29, 2026
Urgent Mozilla Firefox ESR (lt) 153.3.0153.3.0 63 Sep 15, 2026
Urgent Mozilla Firefox ESR (lt) 153.2.0153.2.0 22 Sep 1, 2026
Urgent Mozilla Firefox ESR (lt) 153.1.0153.1.0 39 Aug 18, 2026
Urgent Mozilla Firefox ESR (lt) 140.13.0140.13.0 1 Jul 21, 2026
Urgent Mozilla Firefox ESR (lt) 153.0.0153.0.0 389 Jul 20, 2026
High Mozilla Firefox ESR (lt) 140.12.0140.12.0 2 Jun 16, 2026
High Mozilla Firefox ESR (lt) 140.10.2140.10.2 2 May 7, 2026
High Mozilla Firefox ESR (lt) 140.10.1140.10.1 1 Apr 28, 2026
High Mozilla Firefox ESR (lt) 140.9.1140.9.1 1 Apr 7, 2026
Patch now Mozilla Firefox ESR (lt) 140.3.0140.3.0 142 1 Sep 16, 2025
High Mozilla Firefox ESR (lt) 128.11.0128.11.0 1 May 27, 2025
High Mozilla Firefox ESR (lt) 128.10.0128.10.0 2 Apr 29, 2025
Patch now Mozilla Firefox ESR (lt) 128.3.0128.3.0 178 2 Oct 1, 2024
High Mozilla Firefox ESR (lt) 115.9.0115.9.0 1 Mar 19, 2024

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