https://vivaldi.net/en-US/teamblog/120-vivaldi-1-2-with-mouse-gestures [vivaldi.net]

Ready to make your own mouse gestures? Now you can with Vivaldi 1.2

Today we launched Vivaldi 1.2, with custom mouse gestures. Simply draw the shape, add some other touches, and – presto! – you have your very own mouse gesture.