I've seen this is a long date issue, a lot of people have this problem which looks like not to have a solution but the last post about this has been posted a time ago, so let's go:
I can't open external links with Opera for Android. For exemple, when I'm in a payment app and want to go to the store associated, I go to Opera and it doesn't open the store's app. I just wanted to know if there's a solution for this. If not, I'd like to say that you, developer from Opera, please include this feature on a next update, because this is a basic feature from other browsers. I mean, I'm loving Opera, but I'm missing that. Thanks