Firefox End of Life Dates

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Developers rely on a web browser that can keep up with their needs, and Mozilla Firefox has been a staple in the development community since its inception. Created by the Mozilla Foundation and its subsidiary, the Mozilla Corporation, Firefox is a free and open-source web browser that has been widely adopted due to its flexibility and customizability. With a history spanning many years, Firefox has established itself as a trusted tool for developers, who appreciate its ability to handle complex web applications and provide a seamless browsing experience.

The end-of-life landscape for Firefox is constantly evolving, with new versions being released and older ones reaching their expiration date. Currently, there are 52 versions of Firefox, with 49 of them having reached their end-of-life. This leaves only 3 active versions, including the latest stable version, 115.36.0. The next version to expire will be version 115, which is scheduled to reach its end-of-life on August 28, 2026. This is a significant milestone, as it will mark the end of support for this particular version, and developers will need to ensure they have upgraded to a newer version to continue receiving security updates and patches.

Given the current security landscape, Firefox has a clean slate, with 0 CVEs tracked and 0 critical vulnerabilities reported. As a result, there is no most affected version, and the browser is not currently listed on the Known Exploited Vulnerabilities catalog. This is a testament to the browser's robust security features and the dedication of the Mozilla team to ensuring the security of its users. Despite this, developers should still remain vigilant and ensure they are running the latest version of Firefox to minimize any potential risks and take advantage of the latest security features and patches.

Last updated: Oct 23, 2026

VersionReleasedActive supportEOL dateUntil EOLLatestCVEsStatusAlert me
158 Oct 13, 2026—Oct 27, 2026in 4d158.0.1—EOL soon
157 Sep 29, 2026—Oct 13, 202610d ago157.0.1—EOL
156 Sep 15, 2026—Sep 29, 202624d ago156.0.1—EOL
155 Sep 1, 2026—Sep 15, 202638d ago155.0.1—EOL
154 Aug 18, 2026—Sep 1, 202652d ago154.0.1—EOL
153 LTSJul 21, 2026—No—153.5.1—Active
152 Jun 16, 2026—Jul 21, 202694d ago152.0.6—EOL
151 May 18, 2026—Jun 16, 2026129d ago151.0.4—EOL
150 Apr 21, 2026—May 18, 2026158d ago150.0.3—EOL
149 Mar 24, 2026—Apr 21, 2026185d ago149.0.2—EOL
148 Feb 24, 2026—Mar 24, 2026213d ago148.0.2—EOL
147 Jan 13, 2026—Feb 24, 2026241d ago147.0.4—EOL
146 Dec 9, 2025—Jan 13, 2026283d ago146.0.1—EOL
145 Nov 11, 2025—Dec 9, 2025318d ago145.0.2—EOL
144 Oct 14, 2025—Nov 11, 2025346d ago144.0.2—EOL
143 Sep 16, 2025—Oct 14, 2025374d ago143.0.4—EOL
142 Aug 19, 2025—Sep 16, 2025402d ago142.0.1—EOL
141 Jul 22, 2025—Aug 19, 2025430d ago141.0.3—EOL
140 LTSJun 24, 2025—Sep 29, 202624d ago140.17.0—EOL
139 May 27, 2025—Jun 24, 2025486d ago139.0.4—EOL
138 Apr 29, 2025—May 27, 2025514d ago138.0.4—EOL
137 Apr 1, 2025—Apr 29, 2025542d ago137.0.2—EOL
136 Mar 4, 2025—Apr 1, 2025570d ago136.0.4—EOL
135 Feb 4, 2025—Mar 4, 2025598d ago135.0.1—EOL
134 Jan 7, 2025—Feb 4, 2025626d ago134.0.2—EOL
133 Nov 26, 2024—Jan 7, 2025654d ago133.0.3—EOL
132 Oct 29, 2024—Nov 26, 2024696d ago132.0.2—EOL
131 Oct 1, 2024—Oct 29, 2024724d ago131.0.3—EOL
130 Sep 3, 2024—Oct 1, 2024752d ago130.0.1—EOL
129 Aug 6, 2024—Sep 3, 2024780d ago129.0.2—EOL
128 LTSJul 9, 2024—Sep 16, 2025402d ago128.14.0—EOL
127 Jun 11, 2024—Jul 9, 2024836d ago127.0.2—EOL
126 May 14, 2024—Jun 11, 2024864d ago126.0.1—EOL
125 Apr 16, 2024—May 14, 2024892d ago125.0.3—EOL
124 Mar 19, 2024—Apr 16, 2024920d ago124.0.2—EOL
123 Feb 20, 2024—Mar 19, 2024948d ago123.0.1—EOL
122 Jan 23, 2024—Feb 20, 2024976d ago122.0.1—EOL
121 Dec 19, 2023—Jan 23, 20241004d ago121.0.1—EOL
120 Nov 21, 2023—Dec 19, 20231039d ago120.0.1—EOL
119 Oct 24, 2023—Nov 21, 20231067d ago119.0.1—EOL
118 Sep 26, 2023—Oct 24, 20231095d ago118.0.2—EOL
117 Aug 29, 2023—Sep 26, 20231123d ago117.0.1—EOL
116 Aug 1, 2023—Aug 29, 20231151d ago116.0.3—EOL
115 LTSJul 4, 2023—Mar 31, 2027in 159d115.38.0—Active
114 Jun 6, 2023—Jul 4, 20231207d ago114.0.2—EOL
113 May 9, 2023—Jun 6, 20231235d ago113.0.2—EOL
112 Apr 11, 2023—May 9, 20231263d ago112.0.2—EOL
111 Mar 14, 2023—Apr 11, 20231291d ago111.0.1—EOL
110 Feb 14, 2023—Mar 14, 20231319d ago110.0.1—EOL
109 Jan 17, 2023—Feb 14, 20231347d ago109.0.1—EOL
108 Dec 13, 2022—Jan 17, 20231375d ago108.0.2—EOL
107 Nov 15, 2022—Dec 13, 20221410d ago107.0.1—EOL
106 Oct 18, 2022—Nov 15, 20221438d ago106.0.5—EOL
105 Sep 20, 2022—Oct 18, 20221466d ago105.0.3—EOL
104 Aug 23, 2022—Sep 20, 20221494d ago104.0.2—EOL
103 Jul 26, 2022—Aug 23, 20221522d ago103.0.2—EOL
102 LTSJun 28, 2022—Sep 26, 20231123d ago102.15.1—EOL
91 LTSAug 10, 2021—Sep 20, 20221494d ago91.13.0—EOL
78 LTSJun 30, 2020—Nov 2, 20211816d ago78.15.0—EOL

Data sourced from endoflife.date · CVE data from NVD

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