Source Otter Homepage.
Otter provides users with a modern tabbed browsing experience, where new tabs are opened next to the active one. It is possible to delay loading of tabs until they are selected, as well as to reuse the current tab.
To install Otter Browser just run the following commands via your systems Terminal.
sudo add-apt-repository ppa:otter-browser/release
sudo apt-get update
sudo apt-get install otter-browser
That's all Enjoy!