[SourceBuffer-abort-updating.html] disabled: https://bugzilla.mozilla.org/show_bug.cgi?id=1288343 prefs: [media.mediasource.enabled:true] [SourceBuffer#abort() (video/mp4) : Check the algorithm when the updating attribute is true.] expected: if (os == "win") and (version == "5.1.2600"): FAIL