Because of those advantages, Hilwa has high hopes for Firefox. "All indications are that Firefox 4 will end up being a blockbuster release for [Mozilla], helping them gain their mojo back at least for some time to come."

As of 3:30 p.m. ET Sunday, Mozilla's claimed that over 35 million copies of Firefox 4 had been downloaded since Tuesday.

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.