Created attachment 659368 [details] [diff] [review] patch Right now the reftest harness prints the pixel errors (number of pixels and maximum color difference) below the images. Since they're not on the same line as the TEST-UNEXPECTED-FAIL, they don't end up in intermittent-orange bugs. In some cases, having it in the bugs would be very useful for annotating the problem as a known failure. This would, however, be very useful data to have on intermittent orange bugs, so we ought to have this on the same line as the TEST-UNEXPECTED-FAIL message.
Landed on beta so we have this for ESR17 for the next year. https://hg.mozilla.org/releases/mozilla-beta/rev/8739f223b6e2