Epiphany is the free opensource web browser for the GNOME desktop. Its goal is to be simple and easy to use. Epiphany ties together many GNOME components in order to let you focus on the Web content, instead of the browser application. Epiphany displays webpages with the same speed and accuracy as other popular browsers, such as Safari or Firefox. In addition, it provides an elegant, responsive and uncomplicated user interface that fits in perfectly with GNOME, and it has been translated to over sixty languages!
While this is a browser for GNOME should work on KDE as well.