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.

Note: Although the dates below specify Firefox, they will be followed by the equivalent versions of Thunderbird as well.

Past branch dates

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.

merge date	release date	central	aurora	beta	release
2011-04-12		Firefox 6	Firefox 5
2011-05-17				Firefox 5
2011-05-24		Firefox 7	Firefox 6
2011-06-21					Firefox 5
2011-07-05		Firefox 8	Firefox 7	Firefox 6
2011-08-16		Firefox 9	Firefox 8	Firefox 7	Firefox 6
2011-09-27		Firefox 10	Firefox 9	Firefox 8	Firefox 7
2011-11-08		Firefox 11	Firefox 10	Firefox 9	Firefox 8
2011-12-20		Firefox 12	Firefox 11	Firefox 10	Firefox 9
2012-01-31		Firefox 13	Firefox 12	Firefox 11	Firefox 10
2012-03-13		Firefox 14	Firefox 13	Firefox 12	Firefox 11
2012-04-24		Firefox 15	Firefox 14	Firefox 13	Firefox 12
2012-06-05		Firefox 16	Firefox 15	Firefox 14	Firefox 13
2012-07-16	2012-07-17	Firefox 17	Firefox 16	Firefox 15	Firefox 14
2012-08-27	2012-08-28	Firefox 18	Firefox 17	Firefox 16	Firefox 15

Future branch dates

merge date	release date	central	aurora	beta	release
2012-10-08	2012-10-09	Firefox 19	Firefox 18	Firefox 17	Firefox 16
2012-11-19	2012-11-20	Firefox 20	Firefox 19	Firefox 18	Firefox 17
2012-12-31 TBD*	2013-01-01 TBD*	Firefox 21	Firefox 20	Firefox 19	Firefox 18

...and so on, every six weeks.

*Some releases will be rescheduled to avoid conflicts with major holidays.

Note that the merge from beta -> release happens ahead of time (usually on the Thurs/Friday prior to release date).