Firefox Release Calendar

Upcoming releases
2024
Quarter Version Matching ESR Release Owner Nightly starts Soft code freeze Beta starts Release day
Q4 132 115.17 + 128.4? Ryan September 2 September 26 September 30 October 29
133 115.18 + 128.5? Donal September 30 October 24 October 28 November 26
2025
Q1 134 115.19 + 128.6? Pascal October 28 November 21 November 25 January 7
135 115.20 + 128.7? Ryan November 25 January 2 January 6 February 4
136 115.21 + 128.8? Donal January 6 January 30 February 3 March 4
Q2 137 128.9 Pascal February 3 February 27 March 3 April 1
138 128.10 Dianna March 3 March 27 March 31 April 29
139 128.11 Ryan March 31 April 24 April 28 May 27
140 128.12 + 140.0 Donal April 28 May 22 May 26 June 24
Q3 141 128.13 + 140.1 Pascal May 26 June 19 June 23 July 22
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

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
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