Releases

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?

Upcoming Releases

Please do not edit scheduled dates if you are not a release driver.

Note: the Beta, Aurora and Nightly dates are code merge dates, not release dates.

Firefox 7

Firefox

Currently in BETA channel
Moves to RELEASE week of September 27, 2011

Firefox 8

Firefox

Currently in AURORA channel
Moves to BETA week of September 27, 2011

Firefox 9

Firefox

Currently in NIGHTLY channel
Moves to BETA week of September 27, 2011

Thunderbird 7

Currently in BETA channel
Moves to RELEASED on September 27, 2011

Thunderbird 8

Thunderbird

Currently in EARLYBIRD channel
Moves to BETA week of September 27, 2011

Thunderbird 9

Thunderbird

Currently in DAILY channel
Moves to BETA week of September 27, 2011

Other releases

Name	Scheduled Release Date	Links
Firefox 3.6.21	September 27

Previous Releases

Name	Release Date	Links
SeaMonkey 2.3.1	August 23
Firefox 6	August 16
Firefox 3.6.20	August 16
Thunderbird 3.1.12	August 16
SeaMonkey 2.3	August 16
Firefox 3.6.19	July 11
SeaMonkey 2.2	July 8
SeaMonkey 2.2 Beta 3	July 2
Thunderbird 5	June 28
SeaMonkey 2.2 Beta 2	June 28
Thunderbird 5b2	June 22
SeaMonkey 2.2 Beta 1	June 22
Firefox 3.6.18	June 21	Build
Thunderbird 3.1.11	June 21
Firefox 5 final release	June 21
Firefox 5 for Mobile Final	June 21	Build
Firefox 5 beta 7	June 15
Firefox 5 for Mobile beta 7	June 15
Firefox 5 beta 6	June 14
Firefox 5 for Mobile beta 5	Not released
Firefox 5 beta 5	June 10
Firefox 5 beta 4	Not released
Firefox 5 for Mobile beta 4	June 7
SeaMonkey 2.1	June 10	Build
SeaMonkey 2.1rc2	June 6	Build
Thunderbird 5.0 First Beta	June 2
Firefox 5 for Mobile Beta 3	June 1
Firefox 5 Beta 3	June 1
Firefox 5 for Mobile Beta 2	May 20
Firefox 5 Beta 2	May 20
SeaMonkey 2.1rc1	May 12	Build
Advertised/prompted MU FF3.5.19 → 4.0.1, FF3.6.17 → 4.0.1	May 05
Firefox 4 Macaw	April 28
Firefox 3.6.17	April 28
Firefox 3.5.19	April 28
SeaMonkey 2.0.14	April 28	Build
Firefox 4.0.1 for mobile	April 28	Build, QA
Thunderbird 3.1.10	April 28
SeaMonkey 2.1b3	April 8	Build
Firefox 4.0 for mobile	March 29	Build, QA
SeaMonkey 2.0.13	March 23	Build
Firefox 4.0	March 22	Build, QA
Firefox 3.6.16	March 22	Build
Firefox 3.5.18	March 22	Build
Firefox 4 for mobile RC1	March 21	Build, QA
Thunderbird 3.3 Alpha 3	March 15
Firefox 4.0 RC1	March 9	Build, QA
Firefox 3.6.15	March 4
Thunderbird 3.1.9	March 4
SeaMonkey 2.0.12	March 2	Build
Firefox 3.6.14	March 1	Build, QA
Firefox 3.5.17	March 1	Build, QA
Thunderbird 3.1.8	March 1
Add-on SDK 1.0b3	March 1
Firefox 4.0 Beta 12	February 25	Build, QA
Firefox 4 for mobile Beta 5	February 23 (details)	Build, QA
SeaMonkey 2.1b2	February 14	Build
Firefox 4.0 Beta 11	February 8	Build, QA
Fennec 4.0 Beta 4	February 1 (details)	Build, QA
Firefox 4.0 Beta 10	January 25	Build, QA
Thunderbird 3.3 Alpha 2	January 20
Firefox 4.0 Beta 9	January 14	Build, QA

For releases prior to 2011, please see the archive.