add missing OpenGL driver in order to enable the GPU acceleration

Dockerfile

@@ -11,7 +11,7 @@ RUN apt-get update && \
     apt-get -fy install && \
     apt-get -y install bzip2 libgtk-3-0 libdbus-glib-1-2 libxt6 \
                        libasound2 libgtk2.0-0 libpango1.0-0 libv4l-0 \
-                       pulseaudio && \
+                       pulseaudio libgl1-mesa-glx && \
     rm -rf /var/lib/apt/lists
 
 # Obtain the Mozilla Firefox

README.md

@@ -45,6 +45,19 @@ Check the codecs
 https://www.youtube.com/html5
 ```
 
+Be careful playing with the following settings!
+
+http://www.sitepoint.com/firefox-enable-webgl-blacklisted-graphics-card/
+
+```
+about:config
+layers.acceleration.force-enabled;true
+gl.require-hardware;true
+webgl.force-enabled;true
+
+about:support
+```
+
 
 # Extra