Users of the Google Chrome and Mozilla Firefox Web browsers are far more likely to be cruising the Web with the latest, most secure versions of the browsers than users of either Opera or Safari, a study released today found. The analysis, from researchers at Google Switzerland and the Swiss Federal Institute of Technology, pored through anonymized logs from Google’s Web servers. The results were somewhat unsurprising, but still interesting: 97 percent of Chrome users were browsing with the latest version within 21 days of that version’s release date. By comparison, 85 percent of Firefox users were surfing with the latest version within three weeks of a major new release (this is a marginal improvement over the results from a similar study released last summer, which showed roughly 83 percent of Firefox users browsing with the latest version). The study’s conclusion extols the virtues of auto-update features, functionality that is