@ROCKKER-55 So you can play a YouTube video in one of those browsers and then start Instagram, for example, and the YouTube video keeps playing in background?
a combination of the old Opera 12.x collapsed tabs and Vivaldi's "mouse over scroll wheel tab switching feature" for stacked tabs would be great.
Vivaldi has less useful tab popup thumbnails than Opera 12.x, like many other features which were copied over but still unpolished, while Opera 15++ dropped them completely....