Firefox 3 Beta 5 for DevelopersThe Mozilla organization (mozilla.org) just released the fifth beta version of Firefox 3, the latest interation of its open-source browser, for Windows and Mac, adding a variety of ease-of-use improvements to the software.rnrnThe beta is a public review release intended for testing by developers and to invite community feedback. The beta includes 750 changes from the previous release (beta 4), with a focus on improving performance, memory usage and speed.rnrnBeta 5 reportedly offers improved integration with Windows, Mac and Linux. In the case of Windows, users will see improved icons and native user interface elements in the browser. The Mac version, too, will use familiar native OS X elements in its toolbars, icons and other items. The new beta also includes new items for downloading, and controls for moving between Web pages.rnrnThis instance also includes improvements to its JavaScript engine and optimizations around the speed at which Web applications are run.rnrnDesigned for testing by developers, the Firefox 3 Beta 5 application is available for download in Windows, Mac OS X and Linux builds and in 45 languages. rnrnIn addition to downloading the software, Mozilla recommends that developers read the Firefox 3 For Developers document on the organization’s developers site.