Release Management/Calendar

Note: refer to Release Management Calendar for up-to-date scheduling. This wiki page may not always have the most current information.


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.

B2G Scheduling

Release Version Feature Landing(FL) Feature Complete
1.4 (Gecko 30) 2014-03-17
Gecko 30 moves to mozilla-aurora
Gaia v1.4 created
2014-04-28
Gecko 30 moves to mozilla-beta and mozilla-b2g30_v1_4 created
Gaia v1.4
2.0 (previously 1.5) (Gecko 32) 2014-06-09
Gecko 32 moves to mozilla-aurora
Gaia v2.0 created
2014-07-21
Gecko 32 moves to mozilla-beta and mozilla-b2g32_v2_0 created
Gaia v2.0
2.1 (Gecko 34) 2014-09-01
Gecko 34 moves to mozilla-aurora
Gaia v2.1 created
2014-10-13
Gecko 34 moves to mozilla-beta and mozilla-b2g34_v2_1 created
Gaia v2.1
Release Version Branching Feature Landing(FL) Feature Complete
2.2 (Gecko 37) 2015-01-12 (FLR)
Gecko 37 moves to mozilla-aurora and
mozilla-b2g37_v2_2 created
Gaia v2.2 created
2015-02-23
Gecko mozilla-b2g37_v2_2
Gaia v2.2
2015-04-06
Gecko mozilla-b2g37_v2_2
Gaia v2.2

Note: More details on repos/branches/releases are explained in B2G Landing

Future branch dates

quarter merge date central aurora beta release date release
Q1 2015-01-12* Firefox 38 Firefox 37 Firefox 36 2015-01-13* Firefox 35
2015-02-23 Firefox 39 Firefox 38 Firefox 37 2015-02-24 Firefox 36
Q2 2015-04-06 Firefox 40 Firefox 39 Firefox 38 2015-04-07 Firefox 37
2015-05-18 Firefox 41 Firefox 40 Firefox 39 2015-05-19 Firefox 38
2015-06-29 Firefox 42 Firefox 41 Firefox 40 2015-06-30 Firefox 39
Q3 2015-08-10 Firefox 43 Firefox 42 Firefox 41 2015-08-11 Firefox 40
2015-09-21 Firefox 44 Firefox 43 Firefox 42 2015-09-22 Firefox 41
Q4 2015-11-02 Firefox 45 Firefox 44 Firefox 43 2015-11-03 Firefox 42

...and so on, every six weeks.

For the aurora/cycles, a detailed schedule is published.

*Some release dates and merge dates are rescheduled to avoid conflicts with holidays.

Note that the merge from beta to release happens ahead of time (usually on the Mon/Tue a week before the release date). Release manager list

Past branch dates

merge date central aurora beta release date release
2014-11-28* Firefox 37 Firefox 36 Firefox 35 2014-12-01* Firefox 34
2014-10-13 Firefox 36 Firefox 35 Firefox 34 2014-10-14 Firefox 33
2014-09-02* Firefox 35 Firefox 34 Firefox 33 2014-09-02 Firefox 32
2014-07-21 Firefox 34 Firefox 33 Firefox 32 2014-07-22 Firefox 31
2014-06-09 Firefox 33 Firefox 32 Firefox 31 2014-06-10 Firefox 30
2014-04-28 Firefox 32 Firefox 31 Firefox 30 2014-04-29 Firefox 29
2014-03-17 Firefox 31 Firefox 30 Firefox 29 2014-03-18 Firefox 28
2014-02-03* Firefox 30 Firefox 29 Firefox 28 2014-02-04* Firefox 27
2013-12-09 Firefox 29 Firefox 28 Firefox 27 2013-12-10 Firefox 26
2013-10-28 Firefox 28 Firefox 27 Firefox 26 2013-10-29 Firefox 25
2013-09-16 Firefox 27 Firefox 26 Firefox 25 2013-09-17 Firefox 24
2013-08-05 Firefox 26 Firefox 25 Firefox 24 2013-08-06 Firefox 23
2013-06-24 Firefox 25 Firefox 24 Firefox 23 2013-06-25 Firefox 22
2013-05-13 Firefox 24 Firefox 23 Firefox 22 2013-05-14 Firefox 21
2013-04-01 Firefox 23 Firefox 22 Firefox 21 2013-04-02 Firefox 20
2013-02-19* Firefox 22 Firefox 21 Firefox 20 2013-02-19 Firefox 19
2013-01-07* Firefox 21 Firefox 20 Firefox 19 2013-01-08* Firefox 18
2012-11-19 Firefox 20 Firefox 19 Firefox 18 2012-11-20 Firefox 17
2012-10-08 Firefox 19 Firefox 18 Firefox 17 2012-10-09 Firefox 16
2012-08-27 Firefox 18 Firefox 17 Firefox 16 2012-08-28 Firefox 15
2012-07-16 Firefox 17 Firefox 16 Firefox 15 2012-07-17 Firefox 14
2012-06-05 Firefox 16 Firefox 15 Firefox 14 2012-06-05 Firefox 13
2012-04-24 Firefox 15 Firefox 14 Firefox 13 2012-04-24 Firefox 12
2012-03-13 Firefox 14 Firefox 13 Firefox 12 2012-03-13 Firefox 11
2012-01-31 Firefox 13 Firefox 12 Firefox 11 2012-01-31 Firefox 10
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

Note: Firefox 5 was on a slightly different schedule. It spent five weeks each on Aurora and Beta while all subsequent releases will spend six weeks on each branch.