[object-fit-fill-png-002c.html]
  bug: https://bugzilla.mozilla.org/show_bug.cgi?id=856337
  fuzzy:
    if not webrender and (os == "android"): maxDifference=149;totalPixels=3620
    if not webrender and (os == "linux"): maxDifference=14;totalPixels=1764
    if not webrender and (os == "mac"): maxDifference=16;totalPixels=3108
    if not webrender and (os == "win"): maxDifference=14-16;totalPixels=1764-3153
