Add pref from http://hg.mozilla.org/mozilla-central/rev/477cac85b593
Add pref from http://hg.mozilla.org/mozilla-central/rev/477cac85b593

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