I second this choice. So far Vivaldi has had very frequent updates and the navigational GUI aspect of the browser have the swiss army knife feel to it (not quite up to the par of Opera 12.x days but getting there quickly).

Vivaldi's native tab management far surpasses both Chrome and Firefox. Likewise native mouse gestures work in every place including the speed dial (unlike plugins which attempt to do so on other browsers).

The only thing I miss is tab synchronisation across mobile and desktop devices.