Firefox Release Calendar - MozillaWiki
Firefox Release Calendar
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wtiin:calendar
Warning:
This page will soon be deprecated. Please use
whattrainisitnow.com/calendar
instead.
This schedule is based on the current
RapidRelease
plan. Future dates may change if the process changes. Code is not always released to users on the same day as the branch migration. The release to users may be a few days later, to allow for manual testing and sign-off. Thunderbird tracks the
ESR schedule
column per
Thunderbird release info
Calendars
This wiki page may not always have the most current information. Please refer to one of the following calendars for up-to-date scheduling:
Firefox Merge/Release Dates
ICS for Thunderbird/Lightning or your calendar app
) (low noise)
Firefox Merge/Release Full Scheduling Calendar
ICS
) (highly detailed - 99.99% up to date)
Future branch dates
Release Owners
Quarter
Soft Freeze
Merge Date
Nightly
Beta
Release Date
Release
ESR
Q2 2023
2023-04-06
2023-04-10
Firefox 114
Firefox 113
2023-04-11
Firefox 112
Firefox 102.10
2023-05-04
2023-05-08
Firefox 115
Firefox 114
2023-05-09
Firefox 113
Firefox 102.11
2023-06-01
2023-06-05
Firefox 116
Firefox 115
2023-06-06
Firefox 114
Firefox 102.12
Q3 2023
2023-06-29
2023-07-03
Firefox 117
Firefox 116
2023-07-04
Firefox 115
Firefox 102.13; 115.0
2023-07-27
2023-07-31
Firefox 118
Firefox 117
2023-08-01
Firefox 116
Firefox 102.14; 115.1
2023-08-24
2023-08-28
Firefox 119
Firefox 118
2023-08-29
Firefox 117
Firefox 102.15; 115.2
2023-09-21
2023-09-25
Firefox 120
Firefox 119
2023-09-26
Firefox 118
Firefox 115.3
Q4 2023
2023-10-19
2023-10-23
Firefox 121
Firefox 120
2023-10-24
Firefox 119
Firefox 115.4
2023-11-16
2023-11-20
Firefox 122
Firefox 121
2023-11-21
Firefox 120
Firefox 115.5
2023-12-14
2023-12-18
Firefox 123
Firefox 122
2023-12-19
Firefox 121
Firefox 115.6
Quarter
Fx Release
Nightly begins
Nightly Soft Freeze*
Beta begins
Releases on
Corresponding ESR
Q2 2023
Firefox 112
2023-02-13
2023-03-09
2023-03-13
2023-04-11
Firefox 102.10
Firefox 113
2023-03-13
2023-04-06
2023-04-10
2023-05-09
Firefox 102.11
Firefox 114
2023-04-10
2023-05-04
2023-05-08
2023-06-06
Firefox 102.12
Q3 2023
Firefox 115
2023-05-08
2023-06-01
2023-06-05
2023-07-04
Firefox 102.13; 115.0
Firefox 116
2023-06-05
2023-06-29
2023-07-04
2023-08-01
Firefox 102.14; 115.1
Firefox 117
2023-07-04
2023-07-27
2023-07-31
2023-08-29
Firefox 102.15; 115.2
Firefox 118
2023-07-31
2023-08-24
2023-08-28
2023-09-26
Firefox 115.3
Q4 2023
Firefox 119
2023-08-28
2023-09-21
2023-09-25
2023-10-24
Firefox 115.4
Firefox 120
2023-09-25
2023-10-19
2023-10-23
2023-11-21
Firefox 115.5
Firefox 121
2023-10-23
2023-11-16
2023-11-20
2023-12-19
Firefox 115.6
* The Nightly soft freeze is typically during the week prior to merge day. During this period high-risk patches should avoid landing until after the Nightly version bump lands on mozilla-central on merge day.
Past branch dates
More details on contents of releases can be found in the
release notes archive
or
Wikipedia: Firefox version history
Fx Release
Nightly began
Nightly Soft Freeze
Beta began
Released on
Corresponding ESR
Firefox 111
2023-01-16
2023-02-09
2023-02-13
2023-03-14
Firefox 102.9
Firefox 110
2022-12-12
2023-01-12
2023-01-16
2023-02-14
Firefox 102.8
Firefox 109
2022-11-15
2022-12-08
2022-12-13
2023-01-17
Firefox 102.7
Firefox 108
2022-10-18
2022-11-10
2022-11-15
2022-12-13
Firefox 102.6
Firefox 107
2022-09-20
2022-10-13
2022-10-18
2022-11-15
Firefox 102.5
Firefox 106
2022-08-23
2022-09-15
2022-09-20
2022-10-18
Firefox 102.4
Firefox 105
2022-07-26
2022-08-18
2022-08-23
2022-09-20
Firefox 102.3
Firefox 104
2022-06-28
2022-07-21
2022-07-26
2022-08-23
Firefox 91.13; 102.2
Firefox 103
2022-05-31
2022-06-23
2022-06-28
2022-07-26
Firefox 91.12; 102.1
Firefox 102
2022-05-03
2022-05-26
2022-05-31
2022-06-28
Firefox 91.11; 102.0
Firefox 101
2022-04-05
2022-04-28
2022-05-03
2022-05-31
Firefox 91.10
Firefox 100
2022-03-08
2022-03-31
2022-04-05
2022-05-03
Firefox 91.9
Firefox 99
2022-02-08
2022-03-03
2022-03-08
2022-04-05
Firefox 91.8
Firefox 98
2022-01-11
2022-02-03
2022-02-08
2022-03-08
Firefox 91.7
Firefox 97
2021-12-07
2021-01-06
2022-01-11
2022-02-08
Firefox 91.6
Firefox 96
2021-11-02
2021-12-02
2021-12-07
2022-01-11
Firefox 91.5
Firefox 95
2021-10-05
2021-10-28
2021-11-02
2021-12-07
Firefox 91.4
Firefox 94
2021-09-07
2021-09-30
2021-10-05
2021-11-02
Firefox 91.3
Firefox 93
2021-08-10
2021-09-02
2021-09-07
2021-10-05
Firefox 78.15; 91.2
Firefox 92
2021-07-13
2021-08-05
2021-08-10
2021-09-07
Firefox 78.14; 91.1
Firefox 91
2021-06-01
2021-07-08
2021-07-13
2021-08-10
Firefox 78.13; 91.0
Firefox 90
2021-04-19
2021-05-27
2021-06-01
2021-07-13
Firefox 78.12
Firefox 89
2021-03-23
2021-04-15
2021-04-20
2021-06-01
Firefox 78.11
Firefox 88
2021-02-23
2021-03-18
2021-03-23
2021-04-19
Firefox 78.10
Firefox 87
2021-01-26
2021-02-18
2021-02-23
2021-03-23
Firefox 78.9
Firefox 86
2020-12-15
2021-01-21
2021-01-26
2021-02-23
Firefox 78.8
Firefox 85
2020-11-17
2020-12-10
2020-12-15
2021-01-26
Firefox 78.7
Firefox 84
2020-10-20
2020-11-12
2020-11-17
2020-12-15
Firefox 78.6
Firefox 83
2020-09-22
2020-10-15
2020-10-20
2020-11-17
Firefox 78.5
Firefox 82
2020-08-25
2020-09-17
2020-09-22
2020-10-20
Firefox 78.4
Firefox 81
2020-07-28
2020-08-20
2020-08-24
2020-09-22
Firefox 78.3
Firefox 80
2020-06-30
2020-07-23
2020-07-27
2020-08-25
Firefox 68.12; 78.2
Firefox 79
2020-06-02
2020-06-26
2020-06-29
2020-07-28
Firefox 68.11; 78.1
Firefox 78
2020-05-04
2020-05-28
2020-06-01
2020-06-30
Firefox 68.10; 78.0
Firefox 77
2020-04-06
2020-04-30
2020-05-04
2020-06-02
Firefox 68.9
Firefox 76
2020-03-09
2020-04-02
2020-04-06
2020-05-05
Firefox 68.8
Firefox 75
2020-02-10
2020-03-05
2020-03-09
2020-04-07
Firefox 68.7
Firefox 74
2020-01-06
2020-02-06
2020-02-10
2020-03-10
Firefox 68.6
Firefox 73
2019-12-02
2020-01-02
2020-01-06
2020-02-11
Firefox 68.5
Firefox 72
2019-10-21
2019-11-25
2019-12-02
2020-01-07
Firefox 68.4
Firefox 71
2019-09-02
2019-10-14
2019-10-21
2019-12-03
Firefox 68.3
Firefox 70
2019-07-08
2019-08-26
2019-09-02
2019-10-22
Firefox 68.2
Firefox 69
2019-05-20
2019-07-01
2019-07-08
2019-09-03
Firefox 60.9; 68.1
Firefox 68
2019-03-18
2019-05-13
2019-05-20
2019-07-09
Firefox 60.8; 68.0
Firefox 67
2019-01-28
2019-03-11
2019-03-18
2019-05-21
Firefox 60.7
Firefox 66
2019-12-10
2019-01-21
2019-01-28
2019-03-19
Firefox 60.6
Firefox 65
2018-10-22
2018-12-03
2018-12-10
2019-01-29
Firefox 60.5
Firefox 64
2018-09-05
2018-10-15
2018-10-22
2018-12-11
Firefox 60.4
Firefox 63
2018-06-26
2018-08-21
2018-08-28
2018-10-23
Firefox 60.3
Merge Date
Central
Beta
Release Date
Release
ESR
2018-09-04
Firefox 64
Firefox 63
2018-09-05
Firefox 62
Firefox 60.2
2018-06-25
Firefox 63
Firefox 62
2018-06-26
Firefox 61
Firefox 52.9; 60.1
2018-05-07
Firefox 62
Firefox 61
2018-05-09
Firefox 60
Firefox 52.8; 60.0
2018-03-12
Firefox 61
Firefox 60
2018-03-13
Firefox 59
Firefox 52.7
2018-01-22
Firefox 60
Firefox 59
2018-01-23
Firefox 58
Firefox 52.6
2017-11-13
Firefox 59
Firefox 58
2017-11-14
Firefox 57
Firefox 52.5
2017-09-21
Firefox 58
Firefox 57
2017-09-28
Firefox 56
Firefox 52.4
2017-08-02
Firefox 57
Firefox 56
2017-08-08
Firefox 55
Firefox 52.3
2017-06-12
Firefox 56
Firefox 55
2017-06-13
Firefox 54
Firefox 52.2
2017-04-18
Firefox 55
Firefox 54
2017-04-19
Firefox 53
Firefox 45.9; 52.1
Merge Date
Central
Aurora
Beta
Release Date
Release
ESR
2017-03-06
Firefox 55
Firefox 54
Firefox 53
2017-03-07
Firefox 52
Firefox 45.8; 52.0
2017-01-23
Firefox 54
Firefox 53
Firefox 52
2017-01-24
Firefox 51
Firefox 45.7
2016-12-13
Firefox 50.1.0
Firefox 45.6
2016-11-14
Firefox 53
Firefox 52
Firefox 51
2016-11-15
Firefox 50
Firefox 45.5
2016-09-19
Firefox 52
Firefox 51
Firefox 50
2016-09-20
Firefox 49
Firefox 45.4
2016-08-01
Firefox 51
Firefox 50
Firefox 49
2016-08-02
Firefox 48
Firefox 45.3
2016-06-06
Firefox 50
Firefox 49
Firefox 48
2016-06-07
Firefox 47
Firefox 45.2
2016-04-25
Firefox 49
Firefox 48
Firefox 47
2016-04-26
Firefox 46
Firefox 38.8; 45.1
2016-03-07
Firefox 48
Firefox 47
Firefox 46
2016-03-08
Firefox 45
Firefox 38.7; 45.0
2016-01-25
Firefox 47
Firefox 46
Firefox 45
2016-01-26
Firefox 44
Firefox 38.6
2015-12-14
Firefox 46
Firefox 45
Firefox 44
2015-12-15
Firefox 43
Firefox 38.5
2015-10-29
Firefox 45
Firefox 44
Firefox 43
2015-11-03
Firefox 42
Firefox 38.4
2015-09-21
Firefox 44
Firefox 43
Firefox 42
2015-09-22
Firefox 41
Firefox 38.3
2015-08-10
Firefox 43
Firefox 42
Firefox 41
2015-08-11
Firefox 40
Firefox 38.2
2015-06-29
Firefox 42
Firefox 41
Firefox 40
2015-06-30
Firefox 39
Firefox 31.8; 38.1
2015-06-02
Firefox 38.0.5
2015-05-11*
Firefox 41
Firefox 40
Firefox 39
2015-05-12*
Firefox 38
Firefox 31.7; 38.0
2015-03-30*
Firefox 40
Firefox 39
Firefox 38
2015-03-31*
Firefox 37
Firefox 31.6
2015-02-23
Firefox 39
Firefox 38
Firefox 37
2015-02-24
Firefox 36
Firefox 31.5
2015-01-12*
Firefox 38
Firefox 37
Firefox 36
2015-01-13*
Firefox 35
Firefox 31.4
2014-11-28*
Firefox 37
Firefox 36
Firefox 35
2014-12-01*
Firefox 34
Firefox 31.3
2014-10-13
Firefox 36
Firefox 35
Firefox 34
2014-10-14
Firefox 33
Firefox 31.2
2014-09-02*
Firefox 35
Firefox 34
Firefox 33
2014-09-02
Firefox 32
Firefox 24.8; 31.1
2014-07-21
Firefox 34
Firefox 33
Firefox 32
2014-07-22
Firefox 31
Firefox 24.7; 31.0
2014-06-09
Firefox 33
Firefox 32
Firefox 31
2014-06-10
Firefox 30
Firefox 24.6
2014-04-28
Firefox 32
Firefox 31
Firefox 30
2014-04-29
Firefox 29
Firefox 24.5
2014-03-17
Firefox 31
Firefox 30
Firefox 29
2014-03-18
Firefox 28
Firefox 24.4
2014-02-03*
Firefox 30
Firefox 29
Firefox 28
2014-02-04*
Firefox 27
Firefox 24.3
2013-12-09
Firefox 29
Firefox 28
Firefox 27
2013-12-10
Firefox 26
Firefox 24.2
2013-10-28
Firefox 28
Firefox 27
Firefox 26
2013-10-29
Firefox 25
Firefox 17.0.10; 24.1
2013-09-16
Firefox 27
Firefox 26
Firefox 25
2013-09-17
Firefox 24
Firefox 17.0.9; 24.0
2013-08-05
Firefox 26
Firefox 25
Firefox 24
2013-08-06
Firefox 23
Firefox 17.0.8
2013-06-24
Firefox 25
Firefox 24
Firefox 23
2013-06-25
Firefox 22
Firefox 17.0.7
2013-05-13
Firefox 24
Firefox 23
Firefox 22
2013-05-14
Firefox 21
Firefox 17.0.6
2013-04-01
Firefox 23
Firefox 22
Firefox 21
2013-04-02
Firefox 20
Firefox 17.0.5
2013-02-19*
Firefox 22
Firefox 21
Firefox 20
2013-02-19
Firefox 19
Firefox 17.0.3
2013-01-07*
Firefox 21
Firefox 20
Firefox 19
2013-01-08*
Firefox 18
Firefox 10.0.12; 17.0.2
2012-11-19
Firefox 20
Firefox 19
Firefox 18
2012-11-20
Firefox 17
Firefox 10.0.11; 17.0
2012-10-08
Firefox 19
Firefox 18
Firefox 17
2012-10-09
Firefox 16
Firefox 10.0.8
2012-08-27
Firefox 18
Firefox 17
Firefox 16
2012-08-28
Firefox 15
Firefox 10.0.7
2012-07-16
Firefox 17
Firefox 16
Firefox 15
2012-07-17
Firefox 14
Firefox 10.0.6
2012-06-05
Firefox 16
Firefox 15
Firefox 14
2012-06-05
Firefox 13
Firefox 10.0.5
2012-04-24
Firefox 15
Firefox 14
Firefox 13
2012-04-24
Firefox 12
Firefox 10.0.4
2012-03-13
Firefox 14
Firefox 13
Firefox 12
2012-03-13
Firefox 11
Firefox 10.0.3
2012-01-31
Firefox 13
Firefox 12
Firefox 11
2012-01-31
Firefox 10
Firefox 10.0
2011-12-20
Firefox 12
Firefox 11
Firefox 10
2011-12-20
Firefox 9
2011-11-08
Firefox 11
Firefox 10
Firefox 9
2011-11-08
Firefox 8
2011-09-27
Firefox 10
Firefox 9
Firefox 8
2011-09-27
Firefox 7
2011-08-16
Firefox 9
Firefox 8
Firefox 7
2011-08-16
Firefox 6
2011-07-05
Firefox 8
Firefox 7
Firefox 6
2011-06-21
Firefox 5
2011-05-24
Firefox 7
Firefox 6
2011-05-17
Firefox 5
2011-04-12
Firefox 6
Firefox 5
*Some release dates and merge dates are rescheduled to avoid conflicts with holidays.
Notes:
Four week schedule starting late 2019.
Irregular schedule targeting six to eight week intervals, adjusting for holidays, starting 2016.
Six week schedule from 2011 to 2015 (with some dates delayed to avoid conflicts with holidays).
Firefox 5 was on a slightly different schedule. It spent five weeks each on Aurora and Beta while later releases spent six weeks on each branch.
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