A new version of Firefox, the popular alternative Web browser, is getting close to releasing a third version. That's prompting people to take a close look at the business practices of Mozilla Corp., the maker of Firefox. Danny Sullivan, the longtime search-engine observer, is calling on Mozilla to let Firefox users pick the search engine built into their browser; Firefox 3 defaults to Google in its new release, as it has in the past. Sullivan has a point: Google, which has called for openness, risks seeming hypocritical. But he gets the business side of things all wrong.