History of Firefox - Wikipedia
Mozilla Firefox was created by Dave Hyatt and Blake Ross as an experimental branch of the Mozilla browser. Firefox 1.0 was released on November 9, 2004, Firefox 1.5 was released on November 29, 2005, and version 2.0 was released on October 24, 2006. Firefox 3.0 was released on June 17, 2008, with Firefox 3.5 and Firefox 3.6 released on June 30, 2009 and January 21, 2010, respectively. Firefox 4 was released on March 22, 2011. Since version 5.0, a rapid release cycle was put into effect, resulting in a new major version release every six weeks on Tuesday.
The latest version, Firefox 66.0, was released on March 19, 2019.
Mozilla Firefox was created by Dave Hyatt and Blake Ross as an experimental branch of the Mozilla browser. Firefox 1.0 was released on November 9, 2004, Firefox 1.5 was released on November 29, 2005, and version 2.0 was released on October 24, 2006. Firefox 3.0 was released on June 17, 2008, with Firefox 3.5 and Firefox 3.6 released on June 30, 2009 and January 21, 2010, respectively. Firefox 4 was released on March 22, 2011. Since version 5.0, a rapid release cycle was put into effect, resulting in a new major version release every six weeks on Tuesday.
The latest version, Firefox 66.0, was released on March 19, 2019.