Hi. I'm seriously considering using Arc as my main browser. It's based on Chrome, though, so it's heavily google-fied. But! It's similar to Vivaldi, in the sense it's unique. The tab tree is on the left and you have a split screen option in the task bar area. You can add chrome extensions also, which is great. It's semi-aimed at power users. I haven't discovered all features yet, so far I'm pretty impressed. It updates almost daily/regularly. I'm definitely gonna put it in my roster of main browsers.