However, it appears likely that Microsoft will beat Mozilla to the upgrade punch Monday. The latter's Firefox 4, once slated to ship in November 2010, is nearing completion -- Mozilla has wrapped up the first RC of Firefox 4 -- but will apparently go final after IE9.
Like Microsoft, Mozilla has high hopes its newest browser: Firefox's share has dropped three percentage points since it peaked at 24.7% in November 2009.
Gregg Keizer covers Microsoft, security issues, Apple, Web browsers and general technology breaking news for Computerworld. Follow Gregg on Twitter at @gkeizer or subscribe to Gregg's RSS feed . His e-mail address is firstname.lastname@example.org .
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