* Currently there is no implementation for a frame rate counter for hwc. This allows us to check software versus hardware rendering by turning on the frame rate counter.
** to turn on the frame rate counter, go to settings -> device information -> more information -> developer -> show frames per sec...
** to turn off the hwc :
adb root
adb pull /system/b2g/defaults/pref/user.js .
echo 'pref("layers.composer2d.enabled", false);' >> user.js
adb remount
adb push user.js /system/b2g/defaults/pref
adb shell sync && adb reboot
== Addon to Firefox web browser to see Firefox OS Simulator ==