Releases
From MozillaWiki
Current Releases
Standard support
Based on Gecko 36

Firefox 36
Based on Gecko 36
Based on Gecko 36
Released on some date in the past

SeaMonkey 2.33
Based on Gecko 36
Based on Gecko 36
Released on 2015-01-13
Based on Gecko 31

Thunderbird 31.5.0
Based on Gecko 31
Based on Gecko 31
Released on some date in the past
Based on Gecko 28

Firefox OS 1.3
Based on Gecko 28
Based on Gecko 28
Released on 2014-03-17
Extended support
Based on Gecko 31

Firefox 31.5.0esr
Based on Gecko 31
Based on Gecko 31
Released on some date in the past
Upcoming Releases
NOTE: The dates listed in this section refer to the date of the code merge, not the date of release. See the branch migration calendar for more information.
Based on Gecko 37

Firefox 37
Based on Gecko 37
Based on Gecko 37
Currently in BETA channel
Moves to RELEASE week of April 7, 2015
Moves to RELEASE week of April 7, 2015

Thunderbird 37
Based on Gecko 37
Based on Gecko 37
Currently in BETA channel

SeaMonkey 2.34
Based on Gecko 37
Based on Gecko 37
Currently in BETA channel
Moves to RELEASE week of April 7, 2015
Moves to RELEASE week of April 7, 2015
Based on Gecko 38

Firefox 38
Based on Gecko 38
Based on Gecko 38
Currently in AURORA channel
Moves to BETA week of April 7, 2015
Moves to BETA week of April 7, 2015

Thunderbird 38
Based on Gecko 38
Based on Gecko 38
Currently in EARLYBIRD channel
Moves to BETA week of April 7, 2015
Moves to BETA week of April 7, 2015

SeaMonkey 2.35
Based on Gecko 38
Based on Gecko 38
Currently in AURORA channel
Moves to BETA week of April 7, 2015
Moves to BETA week of April 7, 2015
Based on Gecko 39

Firefox 39
Based on Gecko 39
Based on Gecko 39
Currently in NIGHTLY channel
Moves to AURORA week of April 7, 2015
Moves to AURORA week of April 7, 2015

Thunderbird 39
Based on Gecko 39
Based on Gecko 39
Currently in DAILY channel
Moves to EARLYBIRD week of April 7, 2015
Moves to EARLYBIRD week of April 7, 2015

SeaMonkey 2.36
Based on Gecko 39
Based on Gecko 39
Currently in NIGHTLY channel
Moves to AURORA week of April 7, 2015
Moves to AURORA week of April 7, 2015
B2G Releases

Firefox OS 1.4
Based on Gecko 30
Based on Gecko 30
Released on ??

Firefox OS 2.0
Based on Gecko 32
Based on Gecko 32
Currently in BETA channel
Moves to RELEASE week of ??
Moves to RELEASE week of ??

Firefox OS 2.1
Based on Gecko 34
Based on Gecko 34
Currently in AURORA channel
Moves to BETA week of ??
Moves to BETA week of ??

Firefox OS 2.2
Based on Gecko 37
Based on Gecko 37
Currently in NIGHTLY channel
Moves to AURORA week of ??
Moves to AURORA week of ??
Previous Releases
2015
| Release | Date | Notes |
|---|---|---|
| SeaMonkey 2.32 | January 13 | Release Notes |
| Thunderbird 31.4.0 | January 13 | Release Notes |
2014 and earlier
For releases prior to 2015, see the archive.
Other Links
This is a page for tracking in-progress releases. For maintenance releases, we use a general checklist to ensure we don't miss anything.
- perhaps you'd like to see who release drivers for various releases are?
- or perhaps you'd like to learn more about the priority rankings we assign to releases?
- you might even wonder how we use flags to manage our releases?
- or what branches exist and when they branched?
- perchance you're confused about update terminology?
- maybe you'd like to know about our various branch support levels?
- perhaps you want to see the RapidRelease Calendar for future aurora merges, beta merges, and releases?
- maybe you are interested in checking the Feature Release Tracker for upcoming features?