It's unclear how many users would be impacted in mid-August by the retirement of Firefox 3.6: Although that edition accounted for 42% of all copies last month, the browser has been on a steady decline as people have upgraded to Firefox 4. If the trend of the last three months continues, Firefox 3.6 would near extinction by the end of August.

can still be downloaded manually from Mozilla's website.

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.