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Firefox Release Calendar

Upcoming releases
2025
Quarter Version Matching ESR Release Owner Nightly starts Soft code freeze Beta starts Release day
Q3 142 128.14 + 140.2 Dianna June 23 July 17 July 21 August 19
143 140.3 Ryan July 21 August 14 August 18 September 16
Q4 144 140.4 Donal August 18 September 11 September 15 October 14
145 140.5 Pascal September 15 October 9 October 13 November 11
146 140.6 Dianna October 13 November 6 November 10 December 9
2026
Q1 147 140.7 Ryan November 10 December 4 December 8 January 13
148 140.8 TBD December 8 January 8 January 12 February 10
149 140.9 TBD January 12 February 5 February 9 March 10
Q2 150 140.10 TBD February 9 March 5 March 9 April 7
151 140.11 TBD March 9 April 2 April 6 May 5
152 140.12 TBD April 6 April 30 May 4 June 2
153 140.13 + 153.0 TBD May 4 May 28 June 1 June 30
Q3 154 140.14 + 153.1 TBD June 1 June 25 June 29 July 28
155 140.15 + 153.2 TBD June 29 July 23 July 27 August 25
156 153.3 TBD July 27 August 20 August 24 September 22
Q4 157 153.4 TBD August 24 September 17 September 21 October 20
158 153.5 TBD September 21 October 15 October 19 November 17
159 153.6 TBD October 19 November 12 November 16 December 15
2027
Q1 160 153.7 TBD November 16 December 10 December 14 January 19

Developer Edition follows the Beta schedule.
The above schedule can also be consulted as a detailed monthly view.

Click to toggle past releases table data
Past releases
Version Matching ESR Release owner Nightly starts Beta starts Release day
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