We decided to extend support for ESR 115 only on Windows 7-8.1 and macOS 10.12-10.14 up to September 2025.
We will re-evaluate this decision in August 2025 and announce any updates on ESR 115's end-of-life then.
| Releases calendar |
| Firefox |
ESR |
Old ESR |
Date |
| 137 |
128.9 |
115.22
|
April 1
|
| 138 |
128.10 |
115.23
|
April 29
|
| 139 |
128.11 |
115.24
|
May 27
|
| 140 |
140.0 |
128.12 - 115.25
|
New ESR 140 branch!
June 24
|
| 141 |
140.1 |
128.13 - 115.26
|
July 22
|
| 142 |
140.2 |
128.14 - 115.27
|
August 19
|
| 143 |
140.3 |
|
ESR 115 branch is EOL
ESR 128 branch is EOL
September 16
|
| 144 |
140.4 |
|
October 14
|
| 145 |
140.5 |
|
November 11
|
| 146 |
140.6 |
|
December 9
|
| 147 |
140.7 |
|
January 13
|