This is a staging environment for
whattrainisitnow.com
We decided to
extend support for ESR 115
only on
Windows 7-8.1 and
macOS 10.12-10.14 up to
March 2026.
We will re-evaluate this decision in February 2026 and announce any updates on ESR 115's end-of-life then.
| Releases calendar |
| Firefox |
ESR |
Old ESR |
Date |
| 143 |
140.3 |
115.28
|
ESR branch is EOL
September 16
|
| 144 |
140.4 |
115.29
|
October 14
|
| 145 |
140.5 |
115.30
|
November 11
|
| 146 |
140.6 |
115.31
|
December 9
|
| 147 |
140.7 |
115.32
|
January 13
|
| 148 |
140.8 |
115.33
|
February 24
|
| 149 |
140.9 |
|
ESR 115 branch is EOL
March 24
|
| 150 |
140.10 |
|
April 21
|
| 151 |
140.11 |
|
May 19
|
| 152 |
140.12 |
|
June 16
|
| 153 |
153.0 |
140.13
|
New ESR 153 branch!
July 21
|
| 154 |
153.1 |
140.14
|
August 18
|
| 155 |
153.2 |
140.15
|
September 15
|
| 156 |
153.3 |
|
ESR 140 branch is EOL
October 13
|
| 157 |
153.4 |
|
November 10
|
| 158 |
153.5 |
|
December 8
|
| 159 |
153.6 |
|
January 19
|