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?

Upcoming Releases

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

Name	Scheduled Release Date	Links
Firefox 3.6.17	April 19
Firefox 3.5.19	April 19
Thunderbird 3.1.10	April 19
SeaMonkey 2.0.13	April 19 (In step with Firefox 3.5.18)	Build
SeaMonkey 2.1b3	TBD	Build

Previous Releases

Name	Release Date	Links
Firefox 4.0	March 22	Build, QA
Firefox 4 for mobile RC1	Mar 21 or 22, 2011(details)	Build, QA
Add-on SDK 1.0b3	2011 February 23
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
Firefox 4.0 Beta 12	Feb 25, 2011	Build, QA
Firefox 4 for mobile Beta 5	Feb 23, 2011(details)	Build, QA
SeaMonkey 2.1b2	February 14, 2011	Build
Firefox 4.0 Beta 11	February 8, 2011	Build, QA
Fennec 4.0 Beta 4	Feb 1, 2011 (details)	Build, QA
Firefox 4.0 Beta 10	January 25, 2011	Build, QA
Thunderbird 3.3 Alpha 2	January 20
Firefox 4.0 Beta 9	January 14	Build, QA
Firefox 4.0 Beta 8	December 22 (tied to Fennec 4.0b3)	Build, QA
Fennec 4.0 Beta 3	December 22 (tied to Firefox 4.0b8)	Build, QA
Firefox 3.6.13	December 9	Build, QA
Thunderbird 3.1.7	December 9
Firefox 3.5.16	December 9	Build, QA
Thunderbird 3.0.11	December 9
SeaMonkey 2.0.11	December 9 (tied to Firefox 3.5.16)	Build
Thunderbird 3.3 Alpha 1	November 23
Firefox 4.0 Beta 7	November 10	Build, QA
Fennec 4.0 Beta 2	November 4	Build, QA
Thunderbird 3.1.6	October 27
Thunderbird 3.0.10	October 27
SeaMonkey 2.0.10	October 27	Build
Firefox 3.6.12	October 27	Build, QA, Post-Mortem
Firefox 3.5.15	October 27	Build, QA, Post-Mortem
SeaMonkey 2.1 Beta 1	October 20	Build
SeaMonkey 2.0.9	October 19 (tied to Firefox 3.5.14)	Build
Firefox 3.6.11	October 19	Build, QA
Thunderbird 3.1.5	October 19	Build, QA
Firefox 3.5.14	October 19	Build, QA
Thunderbird 3.0.9	October 19	Build, QA
Fennec 4.0 Beta 1	October 7	Build, QA
Thunderbird 3.1.4	September 16	Build, QA
Thunderbird 3.0.8	September 16	Build, QA
SeaMonkey 2.0.8	September 15	Build
Firefox 3.6.10	September 15	Build, QA
Firefox 3.5.13	September 15	Build, QA
Firefox 4.0 Beta 6	September 14	Build, QA
SeaMonkey 2.0.7	September 7	Build
Firefox 4.0 Beta 5	September 7	Build, QA
Firefox 3.6.9	September 7	Build, QA, Post Mortem
Firefox 3.5.12	September 7	Build, QA
Thunderbird 3.1.3	September 7	Build, QA
Thunderbird 3.0.7	September 7	Build, QA
Fennec 2.0 Alpha 1	August 27	Build, QA
SeaMonkey 2.1 Alpha 3	August 24	Build
Firefox 4.0 Beta 4	August 24	Build, QA
Thunderbird 2.0.0.24 -> 3.1.2 MU	August 18
Thunderbird 3.0.6 -> 3.1.2 MU	August 11	[devmo]
Firefox 4.0 Beta 3	August 11	Build, QA
Thunderbird 3.1.2	August 5	Build, QA
Firefox 4.0 Beta 2	July 27	Build, QA
Firefox 3.6.8	July 23	Build, QA
Firefox 3.6.7	July 20	Build, QA, Post Mortem
Firefox 3.5.11	July 20	Build, QA
Thunderbird 3.0.6	July 20	Build, QA
Thunderbird 3.1.1	July 20	Build, QA
SeaMonkey 2.0.6	July 20	Build
Firefox 3.5.10 -> Firefox 3.6.6 Major Update	July 13
Firefox 3.0.19 -> Firefox 3.6.6 Major Update	July 13
SeaMonkey 2.1 Alpha 2	July 7	Build
Firefox 4.0 Beta 1	July 6	Build, QA
Fennec 1.1 (Maemo)	July 1	Build, QA
Firefox Sync 1.4	July 1
Firefox 3.6.6 (where's 3.6.5?)	June 25	Build, QA
Thunderbird 3.1	June 24
Firefox 3.6.4	June 22	Build, QA, Post Mortem
Firefox 3.5.10	June 22	Build, QA
SeaMonkey 2.0.5	June 22	Build
Thunderbird 3.0.5	June 17	Build, QA
Firefox 3.7 Alpha 5	June 16	Build, QA
Thunderbird 3.1 RC2	June 9	Build, QA
Firefox Sync 1.3	May 28	Build, QA
Thunderbird 3.1 RC1	May 27	Build, QA
Firefox 3.7a4webm	May 19	Build
SeaMonkey 2.1 Alpha 1	May 18	Build
Thunderbird 3.1 Beta 2	May 5	Build, QA
Fennec 1.0.1 (Maemo)	April 13	Build, QA
Firefox 3.7 Alpha 4	April 12	Build, QA
Firefox 3.6.3 Plugin 1	April 8	Build, QA
Firefox 3.6.3	April 1	Build, QA
Firefox 3.0.19	March 30	Build, QA
Firefox 3.5.9	March 30	Build, QA
SeaMonkey 2.0.4	March 30	Build
Thunderbird 3.0.4	March 30	Build, QA
Firefox 3.6.2	March 22	Build, QA
Firefox 3.7 Alpha 3	March 17	Build, QA
Thunderbird 2.0.0.24	March 16	Build, QA
SeaMonkey 1.1.19	March 16	Build
Firefox 3.5.8 -> Firefox 3.6 Major Update	March 11	devnews announcement
Firefox 3.0.19 -> Firefox 3.6 Major Update	March 11	devnews announcement
Thunderbird 3.1 Beta 1	March 10	Build, QA
Firefox 3.7 Alpha 2	March 2	Build, QA
Thunderbird 3.0.3	March 1	Build, QA
Thunderbird 3.0.2	February 25	Build, QA
Fennec 1.1a1 (WinMO)	February 18	Build, QA
Firefox 3.0.18	February 17	Build, QA
Firefox 3.5.8	February 17	Build, QA
SeaMonkey 2.0.3	February 17	Build
Firefox 3.7 Alpha 1	February 10	Build, QA
Funnelcake10 (3.6)	February 4
Thunderbird 3.1 Alpha 1	February 3	Build, QA
Firefox 3.6 Partner Repacks	January 22	Status
Firefox 3.6	January 21	Build, QA
Thunderbird 3.0.1	January 20	Build, QA
Firefox 3.6 RC2	January 17	Build, QA
FF 3.0.17 -> 3.5.7	January 13	Build
SeaMonkey 2.0.2	January 11	Build
Firefox 3.6 RC1	January 8	Build, QA
Firefox 3.0.17	January 5	Build, QA
Firefox 3.5.7	January 5	Build, QA

For releases prior to 2010, please see the archive.