Earlier this week, Mozilla knocked its rival for leaving XP users stuck with the two-year-old IE8, and with no hope for a Microsoft-made browser upgrade.
Firefox could use the jumpstart provided by version 4: Net Applications' statistics show that the browser, once a lock to grab a quarter of the worldwide browser usage share, has stalled since its November 2009 peak. In the last 12 months, Firefox has lost two-and-a-half percentage points of share, and now accounts for 21.7% of all browsers in use.
During that same 12-month period, IE has lost 4.8 percentage points, while Google's Chrome gained 5.3 points and Apple's Safari grew by 1.9 points.
Users can download Firefox 4 for Windows, Mac OS X and Linux from Mozilla's site. People already running Firefox 3.5 or 3.6 can grab the upgrade by selecting "Check for updates" from the browser's Help menu.
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