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Firefox Release Calendar
Firefox Release Calendar
| 2025 | |||||||
|---|---|---|---|---|---|---|---|
| Quarter | Version | Matching ESR | Release Owner | Nightly starts | Soft code freeze | Beta starts | Release day |
| Q4 | 144 | 140.4 + 115.29.0 | Donal | August 18 | September 11 | September 15 | October 14 |
| 145 | 140.5 + 115.30.0 | Pascal | September 15 | October 9 | October 13 | November 11 | |
| 146 | 140.6 + 115.31.0 | Dianna | October 13 | November 6 | November 10 | December 9 | |
| 2026 | |||||||
| Q1 | 147 | 140.7 + 115.32.0 | Ryan | November 10 | December 4 | December 8 | January 13 |
| 148 | 140.8 + 115.33.0 | Donal | December 8 | January 8 | January 12 | February 24 | |
| 149 | 140.9 | Pascal | January 12 | February 19 | February 23 | March 24 | |
| Q2 | 150 | 140.10 | Dianna | February 23 | March 19 | March 23 | April 21 |
| 151 | 140.11 | Ryan | March 23 | April 16 | April 20 | May 19 | |
| 152 | 140.12 | Donal | April 20 | May 14 | May 18 | June 16 | |
| Q3 | 153 | 140.13 + 153.0 | Pascal | May 18 | June 11 | June 15 | July 21 |
| 154 | 140.14 + 153.1 | Dianna | June 15 | July 16 | July 20 | August 18 | |
| 155 | 140.15 + 153.2 | Ryan | July 20 | August 13 | August 17 | September 15 | |
| Q4 | 156 | 153.3 | Donal | August 17 | September 10 | September 14 | October 13 |
| 157 | 153.4 | Pascal | September 14 | October 8 | October 12 | November 10 | |
| 158 | 153.5 | Dianna | October 12 | November 5 | November 9 | December 8 | |
| 2027 | |||||||
| Q1 | 159 | 153.6 | Ryan | November 9 | December 3 | December 7 | January 19 |
Developer Edition follows the Beta schedule.
The above schedule can also be consulted as a detailed monthly view.
- Add to your calendar:
- Release dates only
- Full schedule
- Full schedule (ICS)
Click to toggle past releases table data
| Version | Matching ESR | Release owner | Nightly starts | Beta starts | Release day |
|---|---|---|---|---|---|
| 143.0 | 140.3 | Ryan VanderMeulen | 2025-07-22 | 2025-08-19 | 2025-09-16 |
| 142.0 | 128.14 + 140.2 | Dianna Smith | 2025-06-24 | 2025-07-22 | 2025-08-19 |
| 141.0 | 128.13 + 140.1 | Pascal Chevrel | 2025-05-27 | 2025-06-24 | 2025-07-22 |
| 140.0 | 128.12 + 140.0 | Donal Meehan | 2025-04-29 | 2025-05-27 | 2025-06-24 |
| 139.0 | 115.24 + 128.11 | Ryan VanderMeulen | 2025-04-01 | 2025-04-29 | 2025-05-27 |
| 138.0 | 115.23 + 128.10 | Dianna Smith | 2025-03-04 | 2025-04-01 | 2025-04-29 |
| 137.0 | 115.22 + 128.9 | Pascal Chevrel | 2025-02-04 | 2025-03-04 | 2025-04-01 |
| 136.0 | 115.21 + 128.8 | Donal Meehan | 2025-01-07 | 2025-02-04 | 2025-03-04 |
| 135.0 | 115.20 + 128.7 | Ryan VanderMeulen | 2024-11-26 | 2025-01-07 | 2025-02-04 |
| 134.0 | 115.19 + 128.6 | Pascal Chevrel | 2024-10-29 | 2024-11-26 | 2025-01-07 |
| 133.0 | 115.18 + 128.5 | Donal Meehan | 2024-10-01 | 2024-10-29 | 2024-11-26 |
| 132.0 | 115.17 + 128.4 | Ryan VanderMeulen | 2024-09-03 | 2024-10-01 | 2024-10-29 |
| 131.0 | 115.16 + 128.3 | Dianna Smith | 2024-08-06 | 2024-09-03 | 2024-10-01 |
| 130.0 | 115.15 + 128.2 | Pascal Chevrel | 2024-07-09 | 2024-08-06 | 2024-09-03 |
| 129.0 | 115.14 + 128.1 | Donal Meehan | 2024-06-11 | 2024-07-09 | 2024-08-06 |
| 128.0 | 115.13 + 128.0 | Ryan VanderMeulen | 2024-05-14 | 2024-06-11 | 2024-07-09 |
| 127.0 | 115.12 | Pascal Chevrel | 2024-04-16 | 2024-05-14 | 2024-06-11 |
| 126.0 | 115.11 | Donal Meehan | 2024-03-19 | 2024-04-16 | 2024-05-14 |
| 125.0 | 115.10 | Ryan VanderMeulen | 2024-02-20 | 2024-03-19 | 2024-04-16 |
| 124.0 | 115.9 | Dianna Smith | 2024-01-23 | 2024-02-20 | 2024-03-19 |
| 123.0 | 115.8 | Pascal Chevrel | 2023-12-19 | 2024-01-23 | 2024-02-20 |
| 122.0 | 115.7 | Donal Meehan | 2023-11-21 | 2023-12-19 | 2024-01-23 |
| 121.0 | 115.6 | Ryan VanderMeulen | 2023-10-24 | 2023-11-21 | 2023-12-19 |
| 120.0 | 115.5 | Dianna Smith | 2023-09-26 | 2023-10-24 | 2023-11-21 |
| 119.0 | 115.4 | Donal Meehan | 2023-08-29 | 2023-09-26 | 2023-10-24 |
| 118.0 | 115.3 | Pascal Chevrel | 2023-08-01 | 2023-08-29 | 2023-09-26 |
| 117.0 | 102.15 + 115.2 | Ryan VanderMeulen | 2023-07-04 | 2023-08-01 | 2023-08-29 |
| 116.0 | 102.14 + 115.1 | Dianna Smith | 2023-06-06 | 2023-07-05 | 2023-08-01 |
| 115.0 | 102.13 + 115.0 | Donal Meehan | 2023-05-09 | 2023-06-06 | 2023-07-04 |
| 114.0 | 102.12 | Pascal Chevrel | 2023-04-11 | 2023-05-09 | 2023-06-06 |
| 113.0 | 102.11 | Ryan VanderMeulen | 2023-03-14 | 2023-04-11 | 2023-05-09 |
| 112.0 | 102.10 | Dianna Smith | 2023-02-14 | 2023-03-14 | 2023-04-11 |
| 111.0 | 102.9 | Donal Meehan | 2023-01-17 | 2023-02-14 | 2023-03-14 |
| 110.0 | 102.8 | Pascal Chevrel | 2022-12-13 | 2023-01-17 | 2023-02-14 |
| 109.0 | 102.7 | Ryan VanderMeulen | 2022-11-15 | 2022-12-13 | 2023-01-17 |
| 108.0 | 102.6 | Dianna Smith | 2022-10-18 | 2022-11-15 | 2022-12-13 |
| 107.0 | 102.5 | Donal Meehan | 2022-09-20 | 2022-10-18 | 2022-11-15 |
| 106.0 | 102.4 | Pascal Chevrel | 2022-08-23 | 2022-09-20 | 2022-10-18 |
| 105.0 | 102.3 | Ryan VanderMeulen | 2022-07-26 | 2022-08-23 | 2022-09-20 |
| 104.0 | 91.13 + 102.2 | Dianna Smith | 2022-06-28 | 2022-07-26 | 2022-08-23 |
| 103.0 | 91.12 + 102.1 | Donal Meehan | 2022-05-31 | 2022-06-28 | 2022-07-26 |
| 102.0 | 91.11 + 102.0 | Pascal Chevrel | 2022-05-03 | 2022-05-31 | 2022-06-28 |
| 101.0 | 91.10 | Ryan VanderMeulen | 2022-04-05 | 2022-05-03 | 2022-05-31 |
| 100.0 | 91.9 | Dianna Smith | 2022-03-08 | 2022-04-05 | 2022-05-03 |
| 99.0 | 91.8 | Donal Meehan | 2022-02-08 | 2022-03-08 | 2022-04-05 |
| 98.0 | 91.7 | Pascal Chevrel | 2022-01-11 | 2022-02-08 | 2022-03-08 |
| 97.0 | 91.6 | Ryan VanderMeulen | 2021-12-07 | 2022-01-11 | 2022-02-08 |
| 96.0 | 91.5 | Dianna Smith | 2021-11-02 | 2021-12-07 | 2022-01-11 |
| 95.0 | 91.4 | Pascal Chevrel | 2021-10-05 | 2021-11-02 | 2021-12-07 |
| 94.0 | 91.3 | Ryan VanderMeulen | 2021-09-07 | 2021-10-05 | 2021-11-02 |
| 93.0 | 78.15 + 91.2 | Pascal Chevrel | 2021-08-10 | 2021-09-07 | 2021-10-05 |
| 92.0 | 78.14 + 91.1 | Ryan VanderMeulen | 2021-07-13 | 2021-08-10 | 2021-09-07 |
| 91.0 | 78.13 + 91.0 | Pascal Chevrel | 2021-06-01 | 2021-07-13 | 2021-08-10 |
| 90.0 | 78.12 | Julien Cristau | 2021-04-19 | 2021-06-01 | 2021-07-13 |
| 89.0 | 78.11 | Pascal Chevrel | 2021-03-23 | 2021-04-20 | 2021-06-01 |
| 88.0 | 78.10 | Ryan VanderMeulen | 2021-02-23 | 2021-03-23 | 2021-04-19 |
| 87.0 | 78.9 | Julien Cristau | 2021-01-26 | 2021-02-23 | 2021-03-23 |
| 86.0 | 78.8 | Pascal Chevrel | 2020-12-15 | 2021-01-26 | 2021-02-23 |
| 85.0 | 78.7 | Julien Cristau | 2020-11-17 | 2020-12-15 | 2021-01-26 |
| 84.0 | 78.6 | Ryan VanderMeulen | 2020-10-20 | 2020-11-17 | 2020-12-15 |
| 83.0 | 78.5 | Pascal Chevrel | 2020-09-22 | 2020-10-20 | 2020-11-17 |
| 82.0 | 78.4 | Julien Cristau | 2020-08-25 | 2020-09-22 | 2020-10-20 |
| 81.0 | 78.3 | Ryan VanderMeulen | 2020-07-28 | 2020-08-25 | 2020-09-22 |
| 80.0 | 68.12 + 78.2 | Julien Cristau | 2020-06-30 | 2020-07-29 | 2020-08-25 |
| 79.0 | 68.11 + 78.1 | Ryan VanderMeulen | 2020-06-02 | 2020-06-30 | 2020-07-28 |
| 78.0 | 68.10 + 78.0 | Julien Cristau | 2020-05-05 | 2020-06-02 | 2020-06-30 |
| 77.0 | 68.9 | Pascal Chevrel | 2020-04-07 | 2020-05-05 | 2020-06-02 |
| 76.0 | 68.8 | Ryan VanderMeulen | 2020-03-10 | 2020-04-07 | 2020-05-05 |
| 75.0 | 68.7 | Julien Cristau | 2020-02-11 | 2020-03-10 | 2020-04-07 |
| 74.0 | 68.6 | Pascal Chevrel | 2020-01-07 | 2020-02-11 | 2020-03-10 |
| 73.0 | 68.5 | Ryan VanderMeulen | 2019-12-03 | 2020-01-07 | 2020-02-11 |
| 72.0 | 68.4 | Julien Cristau | 2019-10-22 | 2019-12-03 | 2020-01-07 |
| 71.0 | 68.3 | Pascal Chevrel | 2019-09-03 | 2019-10-22 | 2019-12-03 |
| 70.0 | 68.2 | Liz Henry | 2019-07-09 | 2019-09-03 | 2019-10-22 |
| 69.0 | 60.9 + 68.1 | Ryan VanderMeulen | 2019-05-21 | 2019-07-09 | 2019-09-03 |
| 68.0 | 60.8 + 68.0 | Julien Cristau | 2019-03-19 | 2019-05-22 | 2019-07-09 |
| 67.0 | 60.7 | Pascal Chevrel | 2019-01-29 | 2019-03-19 | 2019-05-21 |
| 66.0 | 60.6 | Liz Henry | 2018-12-11 | 2019-01-29 | 2019-03-19 |
| 65.0 | 60.5 | Ryan VanderMeulen | 2018-10-23 | 2018-12-11 | 2019-01-29 |
| 64.0 | 60.4 | Julien Cristau | 2018-09-05 | 2018-10-23 | 2018-12-11 |
| 63.0 | 60.3 | Pascal Chevrel | 2018-06-26 | 2018-09-05 | 2018-10-23 |
| 62.0 | 60.2 | Liz Henry | 2018-05-09 | 2018-06-26 | 2018-09-05 |
| 61.0 | 52.9 + 60.1 | Ryan VanderMeulen | 2018-03-13 | 2018-05-08 | 2018-06-26 |
| 60.0 | 52.8 + 60.0 | Julien Cristau | 2018-01-23 | 2018-03-14 | 2018-05-09 |
| 59.0 | 52.7 | Liz Henry | 2017-11-14 | 2018-01-24 | 2018-03-13 |
| 58.0 | 52.6 | Gerry Chang | 2017-09-28 | 2017-11-15 | 2018-01-23 |
| 57.0 | 52.5 | Ritu Khotari | 2017-08-08 | 2017-09-26 | 2017-11-14 |
| 56.0 | 52.4 | Liz Henry | 2017-06-13 | 2017-08-09 | 2017-09-28 |
| 55.0 | 52.3 | Julien Cristau | 2017-04-19 | 2017-06-14 | 2017-08-08 |
| 54.0 | 52.2 | Gerry Chang | 2017-01-24 | 2017-04-21 | 2017-06-13 |
| 53.0 | 45.8 + 52.1 | Liz Henry | 2016-11-15 | 2017-03-08 | 2017-04-19 |
| 52.0 | 45.7 + 52.0 | Julien Cristau | 2016-09-20 | 2017-01-25 | 2017-03-07 |
| 51.0 | 45.6 | Gerry Chang | 2016-08-02 | 2016-11-16 | 2017-01-24 |
| 50.0 | 45.5 | Ritu Khotari | 2016-06-07 | 2016-09-22 | 2016-11-15 |
| 49.0 | 45.4 | Liz Henry | 2016-04-26 | 2016-08-03 | 2016-09-20 |
| 48.0 | 45.3 | Sylvestre Ledru | 2016-03-08 | 2016-06-08 | 2016-08-02 |
| 47.0 | 45.2 | Ritu Khotari | 2016-01-26 | 2016-04-27 | 2016-06-07 |
| 46.0 | 38.8 + 45.1 | Liz Henry | 2015-12-15 | 2016-03-23 | 2016-04-26 |
| 45.0 | 38.7 + 45.0 | Sylvestre Ledru | 2015-11-03 | 2016-01-28 | 2016-03-08 |
| 44.0 | 38.6 | Ritu Khotari | 2015-09-22 | 2015-12-18 | 2016-01-26 |
| 43.0 | 38.5 | Liz Henry | 2015-08-11 | 2015-11-04 | 2015-12-15 |
| 42.0 | 38.4 | Sylvestre Ledru | 2015-07-02 | 2015-09-23 | 2015-11-03 |
| 41.0 | 38.3 | Ritu Khotari | 2015-05-12 | 2015-08-12 | 2015-09-22 |
| 40.0 | 38.2 | Sylvestre Ledru | 2015-03-31 | 2015-07-03 | 2015-08-11 |
| 39.0 | 31.8 + 38.1 | Liz Henry | 2015-02-24 | 2015-05-28 | 2015-07-02 |
| 38.0 | 31.7 + 38.0 | Sylvestre Ledru | 2015-01-13 | 2015-04-02 | 2015-05-12 |
| 37.0 | 31.6 | Lawrence Mandel | 2014-12-01 | 2015-02-25 | 2015-03-31 |
| 36.0 | 31.5 | Sylvestre Ledru | 2014-10-14 | 2015-01-16 | 2015-02-24 |
| 35.0 | 31.4 | Lukas Blakk | 2014-09-02 | 2014-12-04 | 2015-01-13 |
| 34.0 | 31.3 | Lukas Blakk | 2014-07-22 | 2014-10-16 | 2014-12-01 |
| 33.0 | 31.2 | Sylvestre Ledru | 2014-06-10 | 2014-09-04 | 2014-10-14 |
| 32.0 | 24.8 + 31.1 | Lawrence Mandel | 2014-04-29 | 2014-07-24 | 2014-09-02 |
| 31.0 | 24.7 + 31.0 | Sylvestre Ledru | 2014-03-18 | 2014-06-12 | 2014-07-22 |
| 30.0 | 24.6 | Lukas Blakk | 2014-02-04 | 2014-05-01 | 2014-06-10 |
| 29.0 | 24.5 | Sylvestre Ledru | 2013-12-10 | 2014-03-20 | 2014-04-29 |
| 28.0 | 24.4 | Lukas Blakk | 2013-10-29 | 2014-02-06 | 2014-03-18 |
| 27.0 | 24.3 | Bhavana Bajaj | 2013-09-17 | 2013-12-12 | 2014-02-04 |
| 26.0 | 24.2 | Lukas Blakk | 2013-08-06 | 2013-10-31 | 2013-12-10 |
| 25.0 | 17.8 + 24.1 | Alex Keybl | 2013-06-25 | 2013-09-18 | 2013-10-29 |
| 24.0 | 17.7 + 24.0 | Bhavana Bajaj | 2013-05-14 | 2013-08-09 | 2013-09-17 |
| 23.0 | 17.6 | Lukas Blakk | 2013-04-02 | 2013-06-27 | 2013-08-06 |
| 22.0 | 17.5 | Alex Keybl | 2013-02-19 | 2013-05-16 | 2013-06-25 |
| 21.0 | 17.4 | Bhavana Bajaj | 2013-01-08 | 2013-04-04 | 2013-05-14 |
| 20.0 | 17.3 | Lukas Blakk | 2012-11-20 | 2013-02-22 | 2013-04-02 |
| 19.0 | 17.2 | Alex Keybl | 2012-10-09 | 2013-01-10 | 2013-02-19 |
| 18.0 | 10.8 + 17.1 | Bhavana Bajaj | 2012-08-28 | 2012-11-26 | 2013-01-08 |
| 17.0 | 10.7 + 17.0 | Lukas Blakk | 2012-07-17 | 2012-10-11 | 2012-11-20 |
| 16.0 | 10.6 | Alex Keybl | 2012-06-05 | 2012-08-30 | 2012-10-09 |
| 15.0 | 10.5 | Alex Keybl | 2012-04-24 | 2012-07-19 | 2012-08-28 |
| 14.0 | 10.4 | Alex Keybl | 2012-03-13 | 2012-06-07 | 2012-07-17 |
| 13.0 | 10.3 | Alex Keybl | 2012-01-31 | 2012-04-26 | 2012-06-05 |
| 12.0 | 10.2 | Alex Keybl | 2011-12-20 | 2012-03-16 | 2012-04-24 |
| 11.0 | 10.1 | Alex Keybl | 2011-11-08 | 2012-02-03 | 2012-03-13 |
| 10.0 | 10.0 | Alex Keybl | 2011-09-27 | 2011-12-22 | 2012-01-31 |
| 9.0 | Christian Legnitto | 2011-08-16 | 2011-11-10 | 2011-12-20 | |
| 8.0 | Christian Legnitto | 2011-07-05 | 2011-09-29 | 2011-11-08 | |
| 7.0 | Christian Legnitto | 2011-05-24 | 2011-08-18 | 2011-09-27 | |
| 6.0 | Christian Legnitto | 2011-04-12 | 2011-07-08 | 2011-08-16 | |
| 5.0 | Christian Legnitto | 2011-05-20 | 2011-06-21 | ||
| 4.0 | Mike Beltzner | 2010-07-06 | 2011-03-22 | ||
| 3.6 | Mike Beltzner | 2009-10-30 | 2010-01-21 | ||
| 3.5 | Mike Beltzner | 2009-04-27 | 2009-06-30 | ||
| 3.0 | Mike Beltzner | 2007-11-19 | 2008-06-17 | ||
| 2.0 | Basil Hashem | 2006-07-12 | 2006-10-24 | ||
| 1.5 | Basil Hashem | 2005-11-01 | 2005-11-29 | ||
| 1.0 | Basil Hashem | 2004-10-27 | 2004-11-09 |