Please bring back the gesture to hold down the right mouse button and scroll through the tabs with the mouse wheel like in Opera12.
There are Extension who should provide that gesture but they do not work. You just released some more mouse gestures to open links in a new tab or window or in a background tab. But why not that important one? Firefox has that gesture already by default, GoogleChrome has working extensions. Come on Opera. I read and wrote about this request already more than 7 months ago.