Snapshot 1.0.418.3 - Focusing on individual requirements, not statistics
Speaking of Stacked Tabs (a vital feature in my browsing life, and one I clung to Opera 12 for) the Vivaldi interface is a bit poor at it. Not to knock it too hard, but those little buttons along the top of the tab are a bit small for quick hitting. They sit in a very fine line between resize window and the active tab. Also, not saying "just do it how Opera did" but the little arrow to expand the group was a very nice interface. Perhaps we could have slightly bigger stack buttons, and also an "expand stack" button or something.