Microsoft has said it will ship the final edition of IE9 before the end of March.

Firefox currently accounts for 22.8% of all browsers used worldwide, a drop of two percentage points since its peak in November 2009. Internet Explorer's 57.1% share during December 2010 was 5.6 percentage points lower than the same time the year before.

can be downloaded for Windows, Mac OS X and Linux from Mozilla's site.

Gregg Keizer covers Microsoft, security issues, Apple, Web browsers and general technology breaking news for Computerworld. Follow Gregg on Twitter at or subscribe to . His e-mail address is .

in Computerworld's Browsers Topic Center.