If you are looking for an additional browser besides already using Mozilla Firefox, Opera or other popular ones then Midori is the one to have.
It is an extremely lightweight, no-frills browser that does one thing very well which is to display web pages very quickly given the minimalistic design.
To install it :
1. Open Terminal and type the following :
sudo apt-get install midori
2. Once installation is complete, go to Menu > Applications > Internet > Midori to start using it.