This week, the Opera web browser became the first non-native browser made available in Apple's Mac App Store, but only for those over seventeen years of age.

Jan Standal, VP of Desktop Products for Opera Software, is surprised.

"I'm very concerned," says Standal. "Seventeen is very young, and I am not sure if, at that age, people are ready to use such an application. It's very fast, you know, and it has a lot of features. I think the download requirement should be at least 18."

For those under 17, there is a workaround. Just visit www.opera.com and download it.

"We do not ask for your age or your credit card number. Please, get your parents' permission before using this browser," Opera said.