Back out bug 807096 for causing bug 891568. a=backout
Bug 886653 - Don't call speex_resampler_skip_zeros when changing the rate in AudioBufferSourceNode. r=ehsan, a=webaudio
Bug 892340 - Remove Off-Main-Thread XPCWrappedJS refcounting from (UDP)ServerSocketListenerProxy. r=mcmanus, a=bajaj
Bug 879161 - Fix pdf.js fallout from bug 855613. r=bdahl, a=bajaj
Bug 890085 - Don't throw in the currentEngine/defaultEngine setters if the defaultenginename pref is invalid. r=mikedeboer, a=bajaj