Windows apps · Mozilla

Firefox Developer Edition (en-US) security updates

The latest version of Firefox Developer Edition (en-US) is 160.0, released October 30, 2026. Patch Radar has 27 security fixes for Firefox Developer Edition (en-US), closing 824 CVEs, 1 of which is being exploited. The newest security fix is Firefox Developer Edition (en-US) 160.0, released October 30, 2026.

1 exploited CVEs
Latest version
160.0
Released Oct 30, 2026
Security fixes
27
On record in Patch Radar
CVEs
824
Closed by those fixes
Exploited
1
Vendor report or CISA KEV

Security fixes, newest first

PriorityFixFixed inCVEsExploitedReleased
Urgent Firefox Developer Edition (en-US) 160.0160.0 76 Oct 30, 2026
Urgent Firefox Developer Edition (en-US) 156.0156.0 259 Sep 2, 2026
Urgent Firefox Developer Edition (en-US) 151.0151.0 88 May 13, 2026
Urgent Firefox Developer Edition (en-US) 149.0149.0 47 Mar 13, 2026
Urgent Firefox Developer Edition (en-US) 148.0148.0 54 Feb 9, 2026
Urgent Firefox Developer Edition (en-US) 147.0147.0 18 Dec 22, 2025
Urgent Firefox Developer Edition (en-US) 146.0146.0 13 Nov 28, 2025
Urgent Firefox Developer Edition (en-US) 145.0145.0 17 Oct 31, 2025
Urgent Firefox Developer Edition (en-US) 144.0144.0 13 Oct 3, 2025
High Firefox Developer Edition (en-US) 143.0143.0 10 Sep 5, 2025
Urgent Firefox Developer Edition (en-US) 142.0142.0 9 Aug 8, 2025
Urgent Firefox Developer Edition (en-US) 141.0141.0 24 Jul 11, 2025
Urgent Firefox Developer Edition (en-US) 140.0140.0 12 Jun 13, 2025
High Firefox Developer Edition (en-US) 139.0139.0 11 May 18, 2025
High Firefox Developer Edition (en-US) 138.0138.0 12 Apr 18, 2025
Urgent Firefox Developer Edition (en-US) 137.0137.0 8 Mar 12, 2025
Urgent Firefox Developer Edition (en-US) 136.0136.0 14 Feb 21, 2025
High Firefox Developer Edition (en-US) 135.0135.0 13 Jan 24, 2025
High Firefox Developer Edition (en-US) 134.0134.0 9 Dec 13, 2024
Urgent Firefox Developer Edition (en-US) 133.0133.0 16 Nov 15, 2024
Patch now Firefox Developer Edition (en-US) 132.0132.0 14 1 Oct 18, 2024
High Firefox Developer Edition (en-US) 131.0131.0 13 Sep 3, 2024
High Firefox Developer Edition (en-US) 130.0130.0 8 Aug 6, 2024
High Firefox Developer Edition (en-US) 129.0129.0 18 Jul 9, 2024
Urgent Firefox Developer Edition (en-US) 128.0128.0 16 Jun 11, 2024
High Firefox Developer Edition (en-US) 127.0127.0 15 May 14, 2024
High Firefox Developer Edition (en-US) 126.0126.0 17 Apr 16, 2024

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