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.
Upcoming ESR releases
| Firefox |
ESR |
Old ESR |
Shipping date |
| 2026 ↓ |
| 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
|
| 2027 ↓ |
| 159 |
153.6 |
|
January 19
|