Touchscreen/mouse gesture request.
I use FF on my laptop with a touchscreen and have installed a mouse gesture extension that allows me to use mouse gestures with long-press. It makes browsing with the touchscreen much easier, it's like mouse gestures with your finger. It's a feature I can't be without now that i have gotten used it. Just long-press and swipe left to go back, press and swipe down right closes tap, press and swipe up go to top of the page, press and swipe up left goes to previous tab, press and swipe up down reloads the page... It's really something I would love to see in Vivaldi, and if there's something that all other browsers struggle with it's touchscreen navigation!