Firefox · Lifecycle Status
Firefox End of Life (EOL) Dates & Support Timeline
Complete end-of-life dates, support windows, and security status for all Firefox versions. Data sourced from endoflife.date and official vendor documentation. Updated at every deploy.
📅 Get reminded before Firefox 115 reaches EOL on August 28, 2026 — alerts 90, 30 & 7 days out.
Latest Active
152.0.1
152 series
Next EOL
115
Aug 28, 2026
Active Versions
1
of 53 total
EOL Versions
50
no longer patched
Medium Risk
EOL Risk Score™ How is this calculated? →
EOL Recency
25/40
Attack Surface
10/30 Medium tier
CISA KEV Exposure
0/20 Not in KEV
Extended Support
10/10 None available
EOL Risk Score™ — proprietary methodology by endoflife.ai. Factors: EOL recency, attack surface breadth, CISA KEV catalog presence, extended support availability. Updated at every build. Methodology →
Release Cycle Timeline
■ EOL
■ Warning
■ Active
┊ Today
All Versions
| Version | Latest Release | Release Date | EOL Date | Days | Status |
|---|---|---|---|---|---|
| 78 LTS | 78.15.0 | Jun 30, 2020 | Nov 2, 2021 | 1694 days past EOL | EOL |
| 91 LTS | 91.13.0 | Aug 10, 2021 | Sep 20, 2022 | 1372 days past EOL | EOL |
| 102 LTS | 102.15.1 | Jun 28, 2022 | Sep 26, 2023 | 1001 days past EOL | EOL |
| 103 | 103.0.2 | Jul 26, 2022 | Aug 23, 2022 | 1400 days past EOL | EOL |
| 104 | 104.0.2 | Aug 23, 2022 | Sep 20, 2022 | 1372 days past EOL | EOL |
| 105 | 105.0.3 | Sep 20, 2022 | Oct 18, 2022 | 1344 days past EOL | EOL |
| 106 | 106.0.5 | Oct 18, 2022 | Nov 15, 2022 | 1316 days past EOL | EOL |
| 107 | 107.0.1 | Nov 15, 2022 | Dec 13, 2022 | 1288 days past EOL | EOL |
| 108 | 108.0.2 | Dec 13, 2022 | Jan 17, 2023 | 1253 days past EOL | EOL |
| 109 | 109.0.1 | Jan 17, 2023 | Feb 14, 2023 | 1225 days past EOL | EOL |
| 110 | 110.0.1 | Feb 14, 2023 | Mar 14, 2023 | 1197 days past EOL | EOL |
| 111 | 111.0.1 | Mar 14, 2023 | Apr 11, 2023 | 1169 days past EOL | EOL |
| 112 | 112.0.2 | Apr 11, 2023 | May 9, 2023 | 1141 days past EOL | EOL |
| 113 | 113.0.2 | May 9, 2023 | Jun 6, 2023 | 1113 days past EOL | EOL |
| 114 | 114.0.2 | Jun 6, 2023 | Jul 4, 2023 | 1085 days past EOL | EOL |
| 115 LTS | 115.37.0 | Jul 4, 2023 | Aug 28, 2026 | 66 days remaining | Warning |
| 116 | 116.0.3 | Aug 1, 2023 | Aug 29, 2023 | 1029 days past EOL | EOL |
| 117 | 117.0.1 | Aug 29, 2023 | Sep 26, 2023 | 1001 days past EOL | EOL |
| 118 | 118.0.2 | Sep 26, 2023 | Oct 24, 2023 | 973 days past EOL | EOL |
| 119 | 119.0.1 | Oct 24, 2023 | Nov 21, 2023 | 945 days past EOL | EOL |
| 120 | 120.0.1 | Nov 21, 2023 | Dec 19, 2023 | 917 days past EOL | EOL |
| 121 | 121.0.1 | Dec 19, 2023 | Jan 23, 2024 | 882 days past EOL | EOL |
| 122 | 122.0.1 | Jan 23, 2024 | Feb 20, 2024 | 854 days past EOL | EOL |
| 123 | 123.0.1 | Feb 20, 2024 | Mar 19, 2024 | 826 days past EOL | EOL |
| 124 | 124.0.2 | Mar 19, 2024 | Apr 16, 2024 | 798 days past EOL | EOL |
| 125 | 125.0.3 | Apr 16, 2024 | May 14, 2024 | 770 days past EOL | EOL |
| 126 | 126.0.1 | May 14, 2024 | Jun 11, 2024 | 742 days past EOL | EOL |
| 127 | 127.0.2 | Jun 11, 2024 | Jul 9, 2024 | 714 days past EOL | EOL |
| 128 LTS | 128.14.0 | Jul 9, 2024 | Sep 16, 2025 | 280 days past EOL | EOL |
| 129 | 129.0.2 | Aug 6, 2024 | Sep 3, 2024 | 658 days past EOL | EOL |
| 130 | 130.0.1 | Sep 3, 2024 | Oct 1, 2024 | 630 days past EOL | EOL |
| 131 | 131.0.3 | Oct 1, 2024 | Oct 29, 2024 | 602 days past EOL | EOL |
| 132 | 132.0.2 | Oct 29, 2024 | Nov 26, 2024 | 574 days past EOL | EOL |
| 133 | 133.0.3 | Nov 26, 2024 | Jan 7, 2025 | 532 days past EOL | EOL |
| 134 | 134.0.2 | Jan 7, 2025 | Feb 4, 2025 | 504 days past EOL | EOL |
| 135 | 135.0.1 | Feb 4, 2025 | Mar 4, 2025 | 476 days past EOL | EOL |
| 136 | 136.0.4 | Mar 4, 2025 | Apr 1, 2025 | 448 days past EOL | EOL |
| 137 | 137.0.2 | Apr 1, 2025 | Apr 29, 2025 | 420 days past EOL | EOL |
| 138 | 138.0.4 | Apr 29, 2025 | May 27, 2025 | 392 days past EOL | EOL |
| 139 | 139.0.4 | May 27, 2025 | Jun 24, 2025 | 364 days past EOL | EOL |
| 140 LTS | 140.12.0 | Jun 24, 2025 | Sep 16, 2026 | 85 days remaining | Warning |
| 141 | 141.0.3 | Jul 22, 2025 | Aug 19, 2025 | 308 days past EOL | EOL |
| 142 | 142.0.1 | Aug 19, 2025 | Sep 16, 2025 | 280 days past EOL | EOL |
| 143 | 143.0.4 | Sep 16, 2025 | Oct 14, 2025 | 252 days past EOL | EOL |
| 144 | 144.0.2 | Oct 14, 2025 | Nov 11, 2025 | 224 days past EOL | EOL |
| 145 | 145.0.2 | Nov 11, 2025 | Dec 9, 2025 | 196 days past EOL | EOL |
| 146 | 146.0.1 | Dec 9, 2025 | Jan 13, 2026 | 161 days past EOL | EOL |
| 147 | 147.0.4 | Jan 13, 2026 | Feb 24, 2026 | 119 days past EOL | EOL |
| 148 | 148.0.2 | Feb 24, 2026 | Mar 24, 2026 | 91 days past EOL | EOL |
| 149 | 149.0.2 | Mar 24, 2026 | Apr 21, 2026 | 63 days past EOL | EOL |
| 150 | 150.0.3 | Apr 21, 2026 | May 18, 2026 | 36 days past EOL | EOL |
| 151 | 151.0.4 | May 18, 2026 | Jun 16, 2026 | 7 days past EOL | EOL |
| 152 | 152.0.1 | Jun 16, 2026 | TBD | Supported | Active |
What does Firefox end of life mean for your organization?
When a version of Firefox reaches end of life, the maintainers stop issuing security patches. Vulnerabilities discovered after this date are publicly disclosed on the National Vulnerability Database, exploit code appears on GitHub, and your systems remain permanently exposed.
The CVE blind spot: Most vulnerability scanners check for known CVEs but do not flag the accumulation of unpatched vulnerabilities in EOL software. With a zero-day, nobody knows about the vulnerability. With EOL software, the vulnerability is public — listed, rated, and often weaponized — but no patch will ever exist. This is the most dangerous gap in enterprise security posture.
Organizations running EOL Firefox should treat it as a vulnerability class in their risk register, apply compensating controls (network segmentation, enhanced monitoring, access restriction), and prioritize migration to a supported version.
Check your full stack for EOL risk
Upload requirements.txt, package.json, or Gemfile — full EOL report instantly.
Open Stack Scanner →Frequently Asked Questions
What is the end-of-life date for Firefox?
The next Firefox version reaching EOL is 115 on August 28, 2026. See the full table above for all version EOL dates.
When is the Firefox support end date?
The next Firefox support end date is August 28, 2026, when version 115 reaches end of support. Each version has its own support end date — see the table above for every version's date.
What is the latest supported version of Firefox?
The latest active version of Firefox is 152.0.1. Always verify against the table above as support windows can change.
What happens when Firefox reaches end of life?
When Firefox reaches end of life, the vendor stops issuing security patches. Any CVEs disclosed after the EOL date accumulate indefinitely with no patch path — creating an ever-growing attack surface that most vulnerability scanners do not flag.
How do I check if I'm running an EOL version of Firefox?
Check your current version against the table above. If your version's EOL date has passed, you are running unsupported software. You can also use the endoflife.ai Stack Scanner to check your entire dependency file at once.
Is there extended support available for EOL Firefox versions?
Some vendors offer extended support for EOL software. Contact the original vendor or check with enterprise support providers for options.