Releases

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Current Releases

Note: This section is in need of some serious love. It depends on a set of templates that appear to be unmaintained. Please use the RapidRelease page instead

Standard support

Based on Gecko 44

Final-50slice.png
Firefox 44
Based on Gecko 44
Released on some date in the past
SM-50slice.png
SeaMonkey 2.41
Based on Gecko 44
Released on 2015-09-26

Based on Gecko 38

Thunderbird-50slice.png
Thunderbird 38.6
Based on Gecko 38
Released on some date in the past

Based on Gecko 28

Fxos-50slice.png.png
Firefox OS 1.3
Based on Gecko 28
Released on 2014-03-17

Extended support

Based on Gecko 38

Final-50slice.png
Firefox 38.6.0esr
Based on Gecko 38
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 45

Final-50slice.png
Firefox 45
Based on Gecko 45
Currently in BETA channel
Moves to RELEASE week of March 8, 2016
Thunderbird-50slice.png
Thunderbird 45
Based on Gecko 45
Currently in BETA channel
SM-50slice.png
SeaMonkey 2.42
Based on Gecko 45
Currently in BETA channel
Moves to RELEASE week of March 8, 2016

Based on Gecko 46

Aurora-50slice.png
Firefox 46
Based on Gecko 46
Currently in AURORA channel
Moves to BETA week of March 8, 2016
Earlybird-50slice.png
Thunderbird 46
Based on Gecko 46
Currently in EARLYBIRD channel
Moves to BETA week of March 8, 2016
SM-50slice.png
SeaMonkey 2.43
Based on Gecko 46
Currently in AURORA channel
Moves to BETA week of March 8, 2016

Based on Gecko 47

Nightly-50slice.png
Firefox 47
Based on Gecko 47
Currently in NIGHTLY channel
Moves to AURORA week of March 8, 2016
Dailybird-50slice.png
Thunderbird 47
Based on Gecko 47
Currently in DAILY channel
Moves to EARLYBIRD week of March 8, 2016
SM-50slice.png
SeaMonkey 2.44
Based on Gecko 47
Currently in NIGHTLY channel
Moves to AURORA week of March 8, 2016

B2G Releases

Fxos-50slice.png.png
Firefox OS 1.4
Based on Gecko 30
Released on ??
Fxos-50slice.png.png
Firefox OS 2.0
Based on Gecko 32
Currently in BETA channel
Moves to RELEASE week of ??
Fxosdev-50slice.png
Firefox OS 2.1
Based on Gecko 34
Currently in AURORA channel
Moves to BETA week of ??
Fxosdev-50slice.png
Firefox OS 2.2
Based on Gecko 37
Currently in NIGHTLY channel
Moves to AURORA week of ??

Previous Releases

More details of the RapidRelease Calendar

2015

The full list of releases is on mozilla.org, but you will need to click through to the notes for each for each release to find out the dates.

Release Date Notes
SeaMonkey 2.38 September 26 Release Notes
Firefox 38.3.0 esr September 22 Release Notes
SeaMonkey 2.35 September 3 Release Notes
Firefox 40.0.3 August 27 Release Notes
Firefox 38.2.1 esr August 27 Release Notes
Thunderbird 38.2.0 August 14 Release Notes
Firefox 40.0.2 August 13 Release Notes
Firefox 38.2.0 esr August 11 Release Notes
Firefox 40 August 11 Release Notes
Firefox 39.0.3 August 6 Release Notes
Thunderbird 31.8.0 July 17 Release Notes
Thunderbird 38.1.0 July 9 Release Notes
Firefox 39 July 02 Release Notes
Firefox 38.1.0 esr July 02 Release Notes
Thunderbird 38.0.1 June 11 Release Notes
Firefox 38.0.5 June 2 Release Notes
Thunderbird 31.7.0 May 12 Release Notes
Firefox 38.0.1 May 14 Release Notes
Firefox 38 May 12 Release Notes
Firefox 37.0.2 April 20 Release Notes
Firefox 37.0.1 April 3 Release Notes
Thunderbird 31.6.0 March 31 Release Notes
Firefox 37 March 31 Release Notes
SeaMonkey 2.33.1 March 23 Release Notes
Firefox 36.0.4 March 21 Release Notes
Firefox 36.0.3 March 20 Release Notes
SeaMonkey 2.33 March 10 Release Notes
Firefox 36.0.1 March 5 Release Notes
Thunderbird 31.5.0 February 24 Release Notes
Firefox 36.0 February 24 Release Notes
SeaMonkey 2.32 January 13 Release Notes
Thunderbird 31.4.0 January 13 Release Notes
Firefox 35.0 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.