Pinch to zoom and scrolling
I've been using Vivaldi for a couple of days I really LOVE it!
Here is my little suggestion:
On MS Edge browser the pinch to zoom and scrolling is working really great so far the best compare to all other browser (I literally tested Chrome, Opera, Firefox), it feels more like mobile phone kind of smoothness and responsiveness.
FYI, I'm using Dell XPS 15 9550 it is MS precision touchpad.
Besides that I really like Vivaldi a lot, it is now became my daily browser on the laptop and desktop.