Releases

For Firefox release information please visit Firefox Extension Guru

Future release dates are approximate and may change due to unforeseen issues


Thunderbird 45

  • 45.0.0 – RELEASED: April 12, 2016

Thunderbird 38

  • 38.0.0 – N/A
  • 38.0.1 – RELEASED: June 11, 2015
  • 38.1.0 –  RELEASED: July 9 2015
  • 38.2.0 – RELEASED: August 14, 2015
  • 38.3.0 – RELEASED: September 29, 2015
  • 38.4.0 – RELEASED: November 25, 2015
  • 38.5.0 – RELEASED: December 23, 2015
  • 38.5.1 – RELEASED: January 7, 2016 (Windows Only Update)
  • 38.6.0 – RELEASED: February 16, 2016
  • 38.7.0 – RELEASED: March 15, 2016
  • 38.7.1 – RELEASED: March 25, 2016
  • 38.7.2 – RELEASED: April 4, 2016

Thunderbird 31

  • 31.0.0 – RELEASED: July 22, 2014 
  • 31.1.0 – RELEASED: September 2, 2014
  • 31.2.0 – RELEASED: October 14, 2014
  • 31.3.0 – RELEASED: December 1, 2014
  • 31.4.0 – RELEASED: January 13, 2015
  • 31.5.0 – RELEASED: February 24, 2015
  • 31.6.0 – RELEASED: March 31, 2015
  • 31.7.0 – RELEASED: May 12, 2015

Thunderbird 24 & 24esr  ##

  • 24.0.0 – RELEASED: September 17, 2013
  • 24.1.0 – RELEASED: October 29, 2013
  • 24.1.1 – RELEASED: November 17, 2013
  • 24.2.0 – RELEASED: December 10, 2013
  • 24.3.0 – RELEASED: February 4, 2014
  • 24.4.0 – RELEASED: March 18, 2014
  • 24.5.0 – RELEASED: April 29. 2014
  • 24.6.0 – RELEASED: June 10, 2014

Thunderbird 17 & 17esr # 

  • 17.0.0 – RELEASED: November 20, 2012
  • 17.0.1 – N/A
  • 17.0.2 – RELEASED: January 8, 2013
  • 17.0.3 – RELEASED: February 19, 2013
  • 17.0.4 – RELEASED: March 8, 2013
  • 17.0.5 – RELEASED: April 2, 2013
  • 17.0.6 – RELEASED: May 14, 2013
  • 17.0.7 – RELEASED: June 25, 2013
  • 17.0.8 – RELEASED: August 6, 2013
  • 17.0.9 – RELEASED: September 17, 2013

Thunderbird 16 – RELEASED: October 9, 2012

Thunderbird 15 – RELEASED: August 28, 2012

Thunderbird 14 – RELEASED:  July 17, 2012

Thunderbird 13 – RELEASED: June 5, 2012

Thunderbird 12 – RELEASED: April 24, 2012

Thunderbird 11.0

  • 11.0.0 – RELEASED: March 14, 2012
  • 11.0.1 – RELEASED: March 28, 2012

Thunderbird 10.0esr (Extended Support Release)

  • 10.0.0esr – RELEASED: January 31, 2012
  • 10.0.1esr – RELEASED: February 10, 2012
  • 10.0.2esr – RELEASED: February 16. 2012
  • 10.0.3esr – RELEASED: March 14th, 2012
  • 10.0.4esr – RELEASED: April 24, 2012
  • 10.0.5esr – RELEASED: June 5, 2012
  • 10.0.6esr – RELEASED: July 17, 2012
  • 10.0.7esr – RELEASED: August 28, 2012
  • 10.0.8esr – RELEASED: October 5, 2012
  • 10.0.9esr – RELEASED: October 9, 2012
  • 10.0.10esr – RELEASED: October 25, 2012
  • 10.0.11esr – RELEASED: November 20, 2012

Thunderbird 10.0

  • 10.0.0 – RELEASED: January 31, 2012
  • 10.0.1 – RELEASED: February 10, 2012
  • 10.0.2 – RELEASED: February 16, 2012

Thunderbird 9.0

  • 9.0.0 – RELEASED: December 20, 2011
  • 9.0.1 – RELEASED: December 23, 2011

Thunderbird 8.0 – RELEASED – November 8, 2011

Thunderbird 7.0

  • 7.0.0 – RELEASED: September 27, 2011
  • 7.0.1 – RELEASED: September 30, 2011

Thunderbird 6.0

  • 6.0.0 – RELEASED: August 16, 2011
  • 6.0.1 – RELEASED: August 30, 2011
  • 6.0.2 – RELEASED: September 6, 2011

Thunderbird 3.3/5.0^

  • 3.3a1 – RELEASED: November 24, 2010
  • 3.3a2 – RELEASED: January 20, 2011
  • 3.3a3 – RELEASED: March 15, 2011
  • 5.0b1 – RELEASED: June 2, 2011
  • 5.0b2 – RELEASED: June 22, 2011
  • 5.0 – RELEASED: June 28, 2011

Thunderbird 3.1

  • 3.1a1 – RELEASED: February 3, 2010
  • 3.1b1 – RELEASED: March 11, 2010
  • 3.1b2 – RELEASED: May 5, 2010
  • 3.1RC1 – RELEASED: May 27, 2010
  • 3.1RC2 – RELEASED: June 9, 2010
  • 3.1.0  – RELEASED: June 24, 2010
  • 3.1.1 – RELEASED: July 20, 2010
  • 3.1.2 – RELEASED: August 5, 2010
  • 3.1.3 – RELEASED: Sept 7, 2010
  • 3.1.4 – RELEASED: Sept 16, 2010
  • 3.1.5 – RELEASED: October 19, 2010
  • 3.1.6 – RELEASED: October 27, 2010
  • 3.1.7 – RELEASED: December 9, 2010
  • 3.1.8 – RELEASED: March 1, 2011
  • 3.1.9 – RELEASED: March 4, 2011
  • 3.1.10 – RELEASED: April 28, 2011
  • 3.1.11 – RELEASED: June 21, 2011
  • 3.1.12 – RELEASED: August 16, 2011
  • 3.1.13 – RELEASED: August 30, 2011
  • 3.1.14 – RELEASED: September 6, 2011
  • 3.1.15 – RELEASED: September 27, 2011
  • 3.1.16 – RELEASED: November 8, 2011
  • 3.1.17 – RELEASED: December 20, 2011
  • 3.1.18 – RELEASED: January 31, 2012
  • 3.1.19 – RELEASED: March 14th, 2012, 2012

Thunderbird 3.0

  • 3.0.0 – RELEASED: December 9, 2009
  • 3.0.1 – RELEASED: January 20, 2010
  • 3.0.2 – RELEASED: February 25, 2010
  • 3.0.3 – RELEASED: March 1, 2010
  • 3.0.4 – RELEASED: March 30, 2010
  • 3.0.5 – RELEASED: June 1, 2010
  • 3.0.6 – RELEASED: July 20, 2010
  • 3.0.7 – RELEASED: Sept 7, 2010
  • 3.0.8 – RELEASED: Sept 16, 2010
  • 3.0.9 – RELEASED: October 19, 2010
  • 3.0.10 – RELEASED: October 27, 2010
  • 3.0.11 – RELEASED: December 9, 2010

Thunderbird 2.0

  • 2.0.0.0 – RELEASED: April 18, 2007
  • 2.0.0.4 – RELEASED: June 14, 2007
  • 2.0.0.5 – RELEASED: July 19, 2007
  • 2.0.0.6 – RELEASED: August 2, 2007
  • 2.0.0.9 – RELEASED: November 14, 2007
  • 2.0.0.12 – RELEASED: February 26, 2008
  • 2.0.0.14 – RELEASED: May 1, 2008
  • 2.0.0.16 – RELEASED: July 23, 2008
  • 2.0.0.17 – RELEASED: September 26, 2008
  • 2.0.0.18 – RELEASED: November 19, 2008
  • 2.0.0.19 – RELEASED: December 31, 2008
  • 2.0.0.21 – RELEASED: March 19, 2009
  • 2.0.0.22 – RELEASED: June 23, 2009
  • 2.0.0.23 – RELEASED: August 20, 2009
  • 2.0.0.24 – RELEASED: March 16, 2010

Thunderbird 1.5

  • 1.5.0.0 – RELEASED: January 17, 2006
  • 1.5.0.1 – N/A
  • 1.5.0.2 – RELEASED: Apri 21, 2006
  • 1.5.0.3 – N/A
  • 1.5.0.4 – RELEASED: June 1, 2006
  • 1.5.0.5 – RELEASED: July 27, 2006
  • 1.5.0.6 – N/A
  • 1.5.0.7 – RELEASED: September 14, 2006
  • 1.5.0.8 – RELEASED: November 7, 2006
  • 1.5.0.9 – RELEASED: December 19, 2006
  • 1.5.0.10 – RELEASED: March 1 2007
  • 1.5.0.12 – RELEASED: May 30, 2007
  • 1.5.0.13 – RELEASED: August 23, 2007
  • 1.5.0.14 – RELEASED: December 19, 2007

Thunderbird 1.0

  • 1.0.0 – RELEASED: February 11, 2005
  • 1.0.1 – N/A
  • 1.0.2 – RELEASED: May 23, 2005
  • 1.0.3 – N/A
  • 1.0.4 – N/A
  • 1.0.5 – RELEASED: July 13, 2005
  • 1.0.6 – RELEASED: August 1, 2005
  • 1.0.7 – RELEASED: December 10, 2005
  • 1.0.8 – RELEASED: April 20, 2006

Notes:

^ In May 2011, Thunderbird has synced with Firefox Rapid Release schedule.
# In January 2013, Thunderbird numbering will follow that of the current ESR branch.
## In June 2014, the Thunderbird ESR builds were discontinued, but the release numbering continues to follow that of the Firefox ESR releases.