Add pref from http://hg.mozilla.org/mozilla-central/rev/e14df2254372
Add pref from http://hg.mozilla.org/mozilla-central/rev/e14df2254372

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