У вашего броузера проблема в совместимости с HTML5
This video shown you how to Install KDE Plasma 5 in Fedora 21 KDE. KDE Plasma 5 is built using Qt 5 and KDE Frameworks 5. Plasma 5.0 improves support for HiDPI displays and ships a converged graphical shell, able to switch between the shells for different target devices. It includes a new default theme, known as Breeze. Changes under the hood include the migration to a new, fully hardware-accelerated graphics stack centered around an OpenGL(ES)-based scene graph (canvas).
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