Add pref from http://hg.mozilla.org/mozilla-central/rev/25ab5381a8e0
Add pref from http://hg.mozilla.org/mozilla-central/rev/25ab5381a8e0

nth10sd/funfuzz,MozillaSecurity/funfuzz,nth10sd/funfuzz,MozillaSecurity/funfuzz,MozillaSecurity/funfuzz,nth10sd/funfuzz