Releases

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Firefox (Fx) Prior Releases
Thunderbird (TBird) Prior Releases

    Firefox 2.0 

  • Fx 2.0.0.0 – RELEASED: October 24th, 2006
  • Fx 2.0.0.1 – RELEASED:December 19th, 2006
  • Fx 2.0.0.2 – RELEASED: February 23rd, 2007
  • Fx 2.0.0.3 – RELEASED: March 20th, 2007
  • Fx 2.0.0.4 – RELEASED: May 30th, 2007
  • Fx 2.0.0.5 – RELEASED: July 16th, 2007
  • Fx 2.0.0.6 – RELEASED: July 30th, 2007
  • Fx 2.0.0.7 – RELEASED: September 18th, 2007
  • Fx 2.0.0.8 – RELEASED: October 18th, 2007
  • Fx 2.0.0.9 – RELEASED: November 1st, 2007
  • Fx 2.0.0.10 – RELEASED: November 26th, 2007
  • Fx 2.0.0.11 – RELEASED: November30th, 2007
  • Fx 2.0.0.12 – RELEASED: February 7th, 2008
  • Fx 2.0.0.13 – RELEASED: March 25th, 2008
  • Fx 2.0.0.14 – RELEASED: April 16th, 2008
  • Fx 2.0.0.15 – RELEASED: July 1st, 2008
  • Fx 2.0.0.16 – RELEASED: July 15th, 2008
  • Fx 2.0.0.16 > 3.0.1 MU – RELEASED: August 25th, 2008
  • Fx 2.0.0.17 – RELEASED: September 23rd, 2008
  • Fx 2.0.0.18 – RELEASED: November 12th, 2008
  • Fx 2.0.0.18 > 3.0.4 MU – RELEASED: December 4th, 2008
  • Fx 2.0.0.19 – RELEASED: December 16th, 2008
  • Fx 2.0.0.20 – RELEASED: December 18th, 2008

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    Firefox 3.0 

  • Fx 3.0a1/Gecko 1.9a1 – RELEASED: December 8th, 2006
  • Fx 3.0a2/Gecko 1.9a2 – RELEASED: February 7th, 2007
  • Fx 3.0a3/Gecko 1.9a3 – RELEASED: March 23rd, 2007
  • Fx 3.0a4/Gecko 1.9a4 – RELEASED: April 27th, 2007
  • Fx 3.0a5/Gecko 1.9a5 – RELEASED: June 6th, 2007
  • Fx 3.0a6/Gecko 1.9a6 – RELEASED: July 2nd, 2007
  • Fx 3.0a7/Gecko 1.9a7 – RELEASED: August 3rd 2007
  • Fx 3.0m8/Gecko 1.9a8 – RELEASED: September 20th, 2007
  • Fx 3.0b1/Gecko 1.9b1 – RELEASED: November 19th, 2007
  • Fx 3.0b2/Gecko 1.9b2 – RELEASED: December 18th, 2007
  • Fx 3.0b3/Gecko 1.9b3 – RELEASED: February 12th, 2008
  • Fx 3.0b4/Gecko 1.9b4 – RELEASED: March 10th, 2008
  • Fx 3.0b5/Gecko 1.9b5 – RELEASED: April 2nd, 2008
  • Fx 3.0RC1/Gecko 1.9RC1 – RELEASED: May 16th, 2008
  • Fx 3.0RC2/Gecko 1.9RC2 – RELEASED: June 4th, 2008
  • Fx 3.0RC3/Gecko 1.9RC3 – RELEASED: June 11th, 2008
  • Fx 3.0 – RELEASED: June 17th, 2008
  • Fx 3.0.1 –RELEASED: July 16th, 2008
  • Fx 3.0.2 – RELEASED: September 23rd, 2008
  • Fx 3.0.3 – RELEASED: September 26th, 2008
  • Fx 3.0.4 – RELEASED: November 12th, 2008
  • Fx 3.0.5 – RELEASED: December 16th, 2008
  • Fx 3.0.6 – RELEASED: February 3rd, 2009
  • Fx 3.0.7 – RELEASED: March 4th, 2009
  • Fx 3.0.8 – RELEASED: March 27th, 2009
  • Fx 3.0.9 – RELEASED: April 22nd, 2009
  • Fx 3.0.10 – RELEASED: April 27th, 2009
  • Fx 3.0.11 – RELEASED: June 12th, 2009
  • Fx 3.0.12 – RELEASED: July 12th, 2009
  • Fx 3.0.13 – RELEASED: August 3, 2009
  • Fx 3.0.14 – RELEASED: September 10, 2009
  • Fx 3.0.15 – RELEASED: October 27, 2009
  • Fx 3.0.16 – RELEASED: December 15,2009
  • Fx 3.0.17 – RELEASED: January 5, 2010
  • Fx 3.0.18 – RELEASED: February 17, 2010
  • Fx 3.0.19 – RELEASED: March 30, 2010

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    Firefox 3.1/3.5* 

  • Fx 3.1a1 – RELEASED: July 29th, 2008
  • Fx 3.1a2 – RELEASED: September 5th, 2008
  • Fx 3.1b1 – RELEASED: October 14th, 2008
  • Fx 3.1b2 – RELEASED: December 8th, 2008
  • Fx 3.1b3 – RELEASED: March 12th, 2009
  • Fx 3.5b4* – RELEASED: April 27th, 2009
  • Fx 3.5 RC1 – N/A**
  • Fx 3.5 RC2 – RELEASED: June 19th, 2009
  • Fx 3.5 RC3 – RELEASED: June 24th, 2009
  • Fx 3.5 – RELEASED: June 30th, 2009
  • Fx 3.5.1 – RELEASED: July 17th, 2009
  • Fx 3.5.2 – RELEASED: August 3, 2009
  • Fx 3.5.3 – RELEASED: September 10, 2009
  • Fx 3.5.4 – RELEASED: October 27, 2009
  • Fx 3.5.5 – RELEASED: November 6, 2009
  • Fx 3.5.6 – RELEASED: December 15, 2009
  • Fx. 3.5.7 – RELEASED: January 8, 2010
  • Fx. 3.5.8 – RELEASED: February 17, 2010
  • Fx. 3.5.9 – RELEASED: March 30, 2010
  • Fx. 3.5.10 – RELEASED: June 22, 2010
  • Fx. 3.5.11 – RELEASED: July 20, 2010
  • Fx. 3.5.12 – RELEASED: September 7, 2010
  • Fx. 3.5.13 – RELEASED: September 16, 2010
  • Fx. 3.5.14 – RELEASED: October 19, 2010
  • Fx. 3.5.15 – RELEASED: October 27, 2010
  • Fx. 3.5.16 – RELEASED: December 9, 2010

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    Firefox 3.6 

  • Fx 3.6a1 – RELEASED: August 7, 2009
  • Fx 3.6b1 – RELEASED: October 30, 2009
  • Fx 3.6b2 – RELEASED: November 11, 2009
  • Fx 3.6b3 – RELEASED: November 17, 2009
  • Fx 3.6b4 – RELEASED: November 26, 2009
  • Fx 3.6b5 – RELEASED: December 17, 2009
  • Fx 3.6RC1 – RELEASED: January 8, 2010
  • Fx 3.6RC2 – RELEASED: January 17, 2010
  • Fx 3.6 – RELEASED: January 21, 2010
  • Fx 3.6.1 – N/A
  • Fx 3.6.2 – RELEASED: March 23, 2010
  • Fx 3.6.3 – RELEASED: April 1, 2010
  • Fx 3.6.4 – RELEASED: June 22, 2010
  • Fx 3.6.5 – N/A
  • Fx 3.6.6 – RELEASED: June 26, 2010
  • Fx 3.6.7 – RELEASED: July 20, 2010
  • Fx 3.6.8 – RELEASED: July 23, 2010
  • Fx 3.6.9 – RELEASED: September 7, 2010
  • Fx 3.6.10 – RELEASED: September 16, 2010
  • Fx 3.6.11 – RELEASED: October 19, 2010
  • Fx 3.6.12 – RELEASED: October 27, 2010
  • Fx 3.6.13 – RELEASED: December 9, 2010

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    Firefox 3.7/4.0 ***
     

  • Fx 3.7a1 – RELEASED: February 10, 2010
  • Fx 3.7a2 – RELEASED: March 2, 2010
  • Fx 3.7a3 – RELEASED: March 17, 2010
  • Fx 3.7a4 – RELEASED: April 12, 2010
  • Fx 3.7a5 – RELEASED: June 14, 2010
  • Fx 4.0b1 – RELEASED: July 7, 2010
  • Fx 4.0b2 – RELEASED: July 27, 2010
  • Fx 4.0b3 – RELEASED: August 12, 2010
  • Fx 4.0b4 – RELEASED: August 24, 2010
  • Fx 4.0b5 – RELEASED: September 7, 2010
  • Fx 4.0b6 – RELEASED: September 14, 2010
  • Fx 4.0b7 – RELEASED: November 10, 2010
  • Fx 4.0b8 – RELEASED: December 21, 2010
  • Fx 4.0b9  -TBD
  • Fx 4.0b10 -TBD
  • Fx 4.0rc1 -TBD
  • Fx 4.0 – TBD

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Notes:
* Build numbering was changed from Firefox 3.1 to 3.5 on the Beta 4 release
** Firefox 3.5 RC1 was not a public “beta release” and was pushed out to user on the Beta 4 build
*** Build numbering was changed from Firefox 3.7 to 4.0 on the Beta 1 build as development was shifted to the Gecko 2.0 trunk.