"I'm pleased to report that on January 8, we had the 100 millionth IE7 installation," Microsoft Group Program Manager Tony Chor said on the IE blog. "However, even more important than installations is usage. According to WebSideStory (the company we use to measure browser usage), as of this week, over 25 percent of all visitors to Web sites in the U.S. were using IE7, making IE7 the second most used browser after IE6."
Microsoft said it expects IE 7 usage to grow as the company completes more localized versions, offers it up to more Windows XP users through Automatic Update and releases Vista to consumers at the end of the month. The final version of the new browser has beenby XP users since October and is also built into Vista.
Rival Firefox is not standing still, meanwhile. The latest version, Firefox 2, was. Mozilla has also , or early test version, of Firefox 3.