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Mozilla Firefox 3.0 is a version of the Firefox web browser released on June 17, 2008 by the Mozilla Corporation.〔 Firefox 3.0 uses version 1.9 of the Gecko layout engine for displaying web pages. This version fixes many bugs, improves standards compliance, and implements many new web APIs compared to Firefox 2.0. Other new features include a redesigned download manager, a new "Places" system for storing bookmarks and history, and separate themes for different operating systems. Firefox 3.0 had over 8 million unique downloads the day it was released, and by July 2008 held over 5.6% of the recorded usage share of web browsers.〔(【引用サイトリンク】publisher=Net Applications )〕 Estimates of Firefox 3.0's global market share were generally in the range of 4–5%, and then dropped as users migrated to Firefox 3.5 and later Firefox 3.6. Partially as a result of this, between mid-December 2009 and the end of January 2010, Firefox 3.5 was the most popular browser (when counting individual browser versions) passing Internet Explorer 7.〔(Firefox 3.5 is world's most popular browser, StatCounter says ), Nick Eaton. seattlepi blogs. 2009-12-21. Retrieved 2009-12-22.〕 Mozilla ended support for Firefox 3 on March 30, 2010 with the release of 3.0.19.〔(Mozilla.org )〕 == Development == Firefox 3.0 was developed under the codename ''Gran Paradiso''. This, like other Firefox codenames, is the name of an actual place; in this case the seventh-highest mountain in the Graian Alps where they first came up with the idea. Planning began in October 2006, when the development team asked users to submit feature requests that they wished to be included in Firefox 3. The Mozilla Foundation released the first beta on November 19, 2007,〔(【引用サイトリンク】author=Mike Beltzner )〕 the second beta on December 18, 2007,〔 the third beta on February 12, 2008, the fourth beta on March 10, 2008, and the fifth and final beta on April 2, 2008. The first release candidate was announced on May 16, 2008, followed by a second release candidate on June 4, 2008, and a third (differing from the second release candidate only in that it corrected a serious bug for Mac users) on June 11, 2008. Mozilla shipped the final release on June 17, 2008.〔(【引用サイトリンク】title=Coming Tuesday, June 17th: Firefox 3 )〕 On its release date, Firefox 3 was featured in popular culture, mentioned on ''The Colbert Report'', among others.〔(【引用サイトリンク】url= http://www.comedycentral.com/colbertreport/full-episodes/index.jhtml?episodeId=173608 )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Firefox 3」の詳細全文を読む スポンサード リンク
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