Unity Web Player doesn´t work

Hey there,
i have the following Problem, I tried to start my Projekt on the Unity webplayer, it says i should install it first. But when i did that it says it again, like I doesn´t installed it. Everything I tried before doesn´t help.
Im using Windows 7 and my Brwoser is Firefox 42.


Same problem. I installed webplayer plugin but Firefox 42 can’t find it on Windows 7 64 bits.

When I go to Unity Real-Time Development Platform | 3D, 2D, VR & AR Engine it says I need to install the plugin :frowning:

Is there a workaround ?