changes

geo.enabled
media.webspeech.synth.enabled
media.mediasource.enabled
media.mediasource.webm.enabled
media.peerconnection.video.h264_enabled
dom.ipc.plugins.asyncInit
canvas.hitregions.enabled
media.webspeech.recognition.enable
dom.experimental_forms
dom.indexedDB.experimental
dom.forms.autocomplete.experimental
network.http.pipelining
privacy.donottrackheader.enabled