Apparently, we are returning to a new era of browsers. We recently spoke about Russian Yandex (we don't cover it, but there's also Microsoft's Spartan), now the new promise is one developed by the original creators of Opera: o Vivaldi.
From the screenshot below, you can see that Vivaldi adapts to the site you are visiting:
It also has several keyboard shortcuts, notes area, quick access to favorite websites, stacking tabs and others. The current version is already interesting, but there is a lot of ground to walk.
The plans of Vivaldi Technologies include the implementation of an email client, data synchronization, ?spatial? navigation with the keyboard, extensions and a lot of performance optimization.
What are you waiting for to try Vivaldi? It is available for OS X, Windows and Linux.