firefox end of life dates — full support timeline
51 of 54 tracked firefox releases have already reached end of life. The dates below are published support dates, not estimates.
Version support timeline
| Release | Released | End of life | Latest | Status |
|---|---|---|---|---|
| 153 LTS | 2026-07-21 | not announced | 153.0.1 | supported |
| 152 | 2026-06-16 | 2026-07-21 | 152.0.6 | ended |
| 151 | 2026-05-18 | 2026-06-16 | 151.0.4 | ended |
| 150 | 2026-04-21 | 2026-05-18 | 150.0.3 | ended |
| 149 | 2026-03-24 | 2026-04-21 | 149.0.2 | ended |
| 148 | 2026-02-24 | 2026-03-24 | 148.0.2 | ended |
| 147 | 2026-01-13 | 2026-02-24 | 147.0.4 | ended |
| 146 | 2025-12-09 | 2026-01-13 | 146.0.1 | ended |
| 145 | 2025-11-11 | 2025-12-09 | 145.0.2 | ended |
| 144 | 2025-10-14 | 2025-11-11 | 144.0.2 | ended |
| 143 | 2025-09-16 | 2025-10-14 | 143.0.4 | ended |
| 142 | 2025-08-19 | 2025-09-16 | 142.0.1 | ended |
| 141 | 2025-07-22 | 2025-08-19 | 141.0.3 | ended |
| 140 LTS | 2025-06-24 | 2026-09-29 | 140.13.0 | ends soon |
| 139 | 2025-05-27 | 2025-06-24 | 139.0.4 | ended |
| 138 | 2025-04-29 | 2025-05-27 | 138.0.4 | ended |
| 137 | 2025-04-01 | 2025-04-29 | 137.0.2 | ended |
| 136 | 2025-03-04 | 2025-04-01 | 136.0.4 | ended |
| 135 | 2025-02-04 | 2025-03-04 | 135.0.1 | ended |
| 134 | 2025-01-07 | 2025-02-04 | 134.0.2 | ended |
| 133 | 2024-11-26 | 2025-01-07 | 133.0.3 | ended |
| 132 | 2024-10-29 | 2024-11-26 | 132.0.2 | ended |
| 131 | 2024-10-01 | 2024-10-29 | 131.0.3 | ended |
| 130 | 2024-09-03 | 2024-10-01 | 130.0.1 | ended |
Who is affected
Anyone running an unsupported firefox release. After end of life a version stops receiving security patches, which typically becomes an audit or compliance finding before it becomes an outage. Upgrading to a supported release is the migration path; the table above shows which releases still qualify.
Source
These dates are maintained by endoflife.date/firefox, an open community dataset that cites vendor announcements. Verify against the vendor before making a compliance decision.
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