The new Vivaldi browser, unveiled a week ago by Opera founder Jon von Tetzchner, is off to a roaring start. Its first technical preview – the thing isn’t even in beta yet – has already had 400,000 downloads. As von Tetzchner said in a Wednesday update to supporters, this is more people than live in his native Iceland. His Vivaldi team is trying to provide a feature-rich power browser for people who don’t like the current trend for pared-back browsers that disappear into the background, a group that these days includes Opera (von Tetzchner quit the company a few years back). He also said in the message that the team will deliver new builds of the browser on a weekly basis.