| Last release | September 15, 2026 |
|---|---|
| Latest version (old branch) | 140.16.0 |
| Latest version (new branch) | 153.3.0 |
| Firefox | ESR | Old ESR | Shipping date |
|---|---|---|---|
| 2026 ↓ | |||
| 156 | 153.3 | 140.16 - 115.41 | September 15 |
| 157 | 153.4 | 140.17 - 115.42 | September 29 |
| 158 | 153.5 | 115.43 | ESR 140 is EOL → Updates to ESR 153 October 13 |
| 159 | 153.6 | 115.44 | October 27 |
| 160 | 153.7 | 115.45 | November 10 |
| 161 | 153.8 | 115.46 | November 24 |
| 162 | 153.9 | 115.47 | December 8 |
| 2027 ↓ | |||
| 163 | 153.10 | 115.48 | January 12 |
| 164 | 153.11 | 115.49 | January 26 |