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Mozilla Firefox 4 is a version of the Firefox web browser, released on March 22, 2011.[6] The first beta was made available on July 6, 2010; Release Candidate 2 (a base for the final version) was released on March 18, 2011.[7][8] It was codenamed Tumucumaque,[9] and was Firefox's last large release cycle. The Mozilla team planned smaller and quicker releases following other browser vendors.[10] The primary goals for this version included improvements in performance, standards support, and user interface.[11]
There was one security update in April 2011 (4.0.1) and version 4 of the browser was made obsolete by the release of Firefox 5 in June 2011.[12]
This marked a transition to giving much less weight to major version numbers, with 5 more major version numbers used by December of that year (5, 6, 7, 8, and 9), compared to 4 in nearly a decade of Firefox development (1, 2, 3, 4).
^"Releases/Firefox 4.0". MozillaWiki. Mozilla Foundation. Retrieved March 16, 2011.
^LCC 3401 Firefox Group (2005). "Firefox Extension Development Tutorial". Rietta. Archived from the original on August 4, 2009. Retrieved December 19, 2009.{{cite web}}: CS1 maint: numeric names: authors list (link)
^Walsh, David (July 10, 2008). "Firefox uses an 'html.css' stylesheet for default rendering styles". The David Walsh Blog. Retrieved December 19, 2009.
^"The Firefox addon, Stylish takes advantage of Firefox's CSS rendering to change the appearance of Firefox". Userstyles.org. Archived from the original on May 23, 2009. Retrieved December 19, 2009.
^"Mozilla End-User Licensing Agreements". Mozilla Foundation. Retrieved November 8, 2010.
^Fiveash, Kelly (March 21, 2011). "Firefox 4 gets yet another final test build release". The Register. Archived from the original on March 8, 2018.
^Firefox/4/Beta "Firefox/4/Beta". MozillaWiki. Mozilla Foundation. March 23, 2011. Retrieved February 10, 2011. {{cite web}}: Check |url= value (help)
^Rooney, Paula (March 2, 2011). "Firefox 4 RC expected to ship roughly on March 9". ZDNet. Archived from the original on August 28, 2016.
^Novak, Chelsea (July 8, 2011). "Looking back on Mozilla Parks". Chelsea Novak (blog). Archived from the original on July 14, 2011. Retrieved September 27, 2013 – via WordPress.
^Kobie, Nicole (February 28, 2011). "Mozilla: Firefox 4 will be our last big release". PC Pro. Archived from the original on October 13, 2013. Retrieved March 3, 2011.
^Beltzner, Mike (May 10, 2010). "Firefox 4: fast, powerful, and empowering". Archived from the original on May 12, 2010. Retrieved September 21, 2010.
^Cite error: The named reference computerworld was invoked but never defined (see the help page).
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