[object-position-png-002c.html]
  bug: https://bugzilla.mozilla.org/show_bug.cgi?id=856337
  fuzzy:
    if not webrender and (os == "android"): maxDifference=233;totalPixels=388
    if not webrender and (os == "linux"): maxDifference=166;totalPixels=388
    if not webrender and (os == "mac"): maxDifference=165;totalPixels=388
    if not webrender and (os == "win"): maxDifference=165-166;totalPixels=388
