We have decided to extend support to ESR 115 only on
Windows 7-8.1 and
macOS 10.12-10.14 up to
August 2026.
We will re-evaluate this decision in July 2026 and announce any updates on ESR 115's end-of-life then.
Upcoming ESR releases
| Firefox |
ESR |
Old ESR |
Shipping date |
| 2026 ↓ |
| 150 |
140.10 |
115.35
|
April 21
|
| 151 |
140.11 |
115.36
|
May 19
|
| 152 |
140.12 |
115.37
|
June 16
|
| 153 |
153.0 |
140.13 - 115.38
|
New ESR 153 branch!
July 21
|
| 154 |
153.1 |
140.14 - 115.39
|
August 18
|
| 155 |
153.2 |
140.15
|
ESR 115 branch is EOL
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
|