Firefox End of Life (EOL), End of Support (EOS), EOSL, EOSS, and EOSM Dates

Latest Release: 149.0.2 (April 07, 2026)

Currently Supported Firefox Releases - Active EOS/EOSL Support (1)

Release	Released	Security Support	Latest	LTS
149	2026-03-24 (2 weeks and 2 days ago)	-	149.0.2 2026-04-07 (2 days ago)	-

Firefox Releases Nearing End of Life - Support Ending Soon (2)

Important: The following Firefox releases will reach End of Life (EOL) within 6 months. Plan your migration to a supported release to ensure continued security updates and support.

Release	Released	Security Support	Latest	LTS
115 (ESR)	2023-07-04 (2 years and 9 months ago)	2026-08-28 (in 4 months)	115.34.1 2026-04-07 (2 days ago)	LTS
140 (ESR)	2025-06-24 (9 months ago)	2026-09-16 (in 5 months)	140.9.1 2026-04-07 (2 days ago)	LTS

Firefox End of Life (EOL) Releases - No Longer Supported (47)

Release	Released	Security Support	Latest	LTS
148	2026-02-24 (1 month and 2 weeks ago)	2026-03-24 (2 weeks and 2 days ago)	148.0.2 2026-03-10 (4 weeks and 2 days ago)	-
147	2026-01-13 (2 months ago)	2026-02-24 (1 month and 2 weeks ago)	147.0.4 2026-02-16 (1 month and 3 weeks ago)	-
146	2025-12-09 (4 months ago)	2026-01-13 (2 months ago)	146.0.1 2025-12-18 (3 months ago)	-
145	2025-11-11 (4 months ago)	2025-12-09 (4 months ago)	145.0.2 2025-11-25 (4 months ago)	-
144	2025-10-14 (5 months ago)	2025-11-11 (4 months ago)	144.0.2 2025-10-28 (5 months ago)	-

143	2025-09-16 (6 months ago)	2025-10-14 (5 months ago)	143.0.4 2025-10-03 (6 months ago)	-
142	2025-08-19 (7 months ago)	2025-09-16 (6 months ago)	142.0.1 2025-08-27 (7 months ago)	-
141	2025-07-22 (8 months ago)	2025-08-19 (7 months ago)	141.0.3 2025-08-07 (8 months ago)	-
139	2025-05-27 (10 months ago)	2025-06-24 (9 months ago)	139.0.4 2025-06-10 (9 months ago)	-
138	2025-04-29 (11 months ago)	2025-05-27 (10 months ago)	138.0.4 2025-05-17 (10 months ago)	-
137	2025-04-01 (1 year ago)	2025-04-29 (11 months ago)	137.0.2 2025-04-15 (11 months ago)	-
136	2025-03-04 (1 year and 1 month ago)	2025-04-01 (1 year ago)	136.0.4 2025-03-27 (1 year ago)	-
135	2025-02-04 (1 year and 2 months ago)	2025-03-04 (1 year and 1 month ago)	135.0.1 2025-02-18 (1 year and 1 month ago)	-
134	2025-01-07 (1 year and 3 months ago)	2025-02-04 (1 year and 2 months ago)	134.0.2 2025-01-21 (1 year and 2 months ago)	-
133	2024-11-26 (1 year and 4 months ago)	2025-01-07 (1 year and 3 months ago)	133.0.3 2024-12-10 (1 year and 3 months ago)	-
132	2024-10-29 (1 year and 5 months ago)	2024-11-26 (1 year and 4 months ago)	132.0.2 2024-11-12 (1 year and 4 months ago)	-
131	2024-10-01 (1 year and 6 months ago)	2024-10-29 (1 year and 5 months ago)	131.0.3 2024-10-14 (1 year and 5 months ago)	-
130	2024-09-03 (1 year and 7 months ago)	2024-10-01 (1 year and 6 months ago)	130.0.1 2024-09-17 (1 year and 6 months ago)	-
129	2024-08-06 (1 year and 8 months ago)	2024-09-03 (1 year and 7 months ago)	129.0.2 2024-08-20 (1 year and 7 months ago)	-
128 (ESR)	2024-07-09 (1 year and 9 months ago)	2025-09-16 (6 months ago)	128.14.0 2025-08-19 (7 months ago)	LTS
127	2024-06-11 (1 year and 9 months ago)	2024-07-09 (1 year and 9 months ago)	127.0.2 2024-06-25 (1 year and 9 months ago)	-
126	2024-05-14 (1 year and 10 months ago)	2024-06-11 (1 year and 9 months ago)	126.0.1 2024-05-28 (1 year and 10 months ago)	-
125	2024-04-16 (1 year and 11 months ago)	2024-05-14 (1 year and 10 months ago)	125.0.3 2024-04-29 (1 year and 11 months ago)	-
124	2024-03-19 (2 years ago)	2024-04-16 (1 year and 11 months ago)	124.0.2 2024-04-02 (2 years ago)	-
123	2024-02-20 (2 years and 1 month ago)	2024-03-19 (2 years ago)	123.0.1 2024-03-05 (2 years and 1 month ago)	-
122	2024-01-23 (2 years and 2 months ago)	2024-02-20 (2 years and 1 month ago)	122.0.1 2024-02-06 (2 years and 2 months ago)	-
121	2023-12-19 (2 years and 3 months ago)	2024-01-23 (2 years and 2 months ago)	121.0.1 2024-01-09 (2 years and 3 months ago)	-
120	2023-11-21 (2 years and 4 months ago)	2023-12-19 (2 years and 3 months ago)	120.0.1 2023-11-30 (2 years and 4 months ago)	-
119	2023-10-24 (2 years and 5 months ago)	2023-11-21 (2 years and 4 months ago)	119.0.1 2023-11-07 (2 years and 5 months ago)	-
118	2023-09-26 (2 years and 6 months ago)	2023-10-24 (2 years and 5 months ago)	118.0.2 2023-10-10 (2 years and 5 months ago)	-
117	2023-08-29 (2 years and 7 months ago)	2023-09-26 (2 years and 6 months ago)	117.0.1 2023-09-12 (2 years and 6 months ago)	-
116	2023-08-01 (2 years and 8 months ago)	2023-08-29 (2 years and 7 months ago)	116.0.3 2023-08-16 (2 years and 7 months ago)	-
114	2023-06-06 (2 years and 10 months ago)	2023-07-04 (2 years and 9 months ago)	114.0.2 2023-06-20 (2 years and 9 months ago)	-
113	2023-05-09 (2 years and 11 months ago)	2023-06-06 (2 years and 10 months ago)	113.0.2 2023-05-23 (2 years and 10 months ago)	-
112	2023-04-11 (2 years and 11 months ago)	2023-05-09 (2 years and 11 months ago)	112.0.2 2023-04-25 (2 years and 11 months ago)	-
111	2023-03-14 (3 years ago)	2023-04-11 (2 years and 11 months ago)	111.0.1 2023-03-21 (3 years ago)	-
110	2023-02-14 (3 years and 1 month ago)	2023-03-14 (3 years ago)	110.0.1 2023-02-28 (3 years and 1 month ago)	-
109	2023-01-17 (3 years and 2 months ago)	2023-02-14 (3 years and 1 month ago)	109.0.1 2023-01-31 (3 years and 2 months ago)	-
108	2022-12-13 (3 years and 3 months ago)	2023-01-17 (3 years and 2 months ago)	108.0.2 2023-01-05 (3 years and 3 months ago)	-
107	2022-11-15 (3 years and 4 months ago)	2022-12-13 (3 years and 3 months ago)	107.0.1 2022-11-29 (3 years and 4 months ago)	-
106	2022-10-18 (3 years and 5 months ago)	2022-11-15 (3 years and 4 months ago)	106.0.5 2022-11-04 (3 years and 5 months ago)	-
105	2022-09-20 (3 years and 6 months ago)	2022-10-18 (3 years and 5 months ago)	105.0.3 2022-10-07 (3 years and 6 months ago)	-
104	2022-08-23 (3 years and 7 months ago)	2022-09-20 (3 years and 6 months ago)	104.0.2 2022-09-06 (3 years and 7 months ago)	-
103	2022-07-26 (3 years and 8 months ago)	2022-08-23 (3 years and 7 months ago)	103.0.2 2022-08-09 (3 years and 8 months ago)	-
102 (ESR)	2022-06-28 (3 years and 9 months ago)	2023-09-26 (2 years and 6 months ago)	102.15.1 2023-09-12 (2 years and 6 months ago)	LTS
91 (ESR)	2021-08-10 (4 years and 7 months ago)	2022-09-20 (3 years and 6 months ago)	91.13.0 2022-08-23 (3 years and 7 months ago)	LTS
78 (ESR)	2020-06-30 (5 years and 9 months ago)	2021-11-02 (4 years and 5 months ago)	78.15.0 2021-10-05 (4 years and 6 months ago)	LTS

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