This is the smallest regression range I have so far: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=ac50a7bd09b0a9262eed73f9dee2ffbd0e1a33b2&tochange=b7030ce607ec56690829e8fb6dbcd27dd54a044c So it sounds like bug 1558242 ?
Bug 1565687 Comment 3 Edit History
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This is the smallest regression range I could find: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=ac50a7bd09b0a9262eed73f9dee2ffbd0e1a33b2&tochange=b7030ce607ec56690829e8fb6dbcd27dd54a044c So it sounds like bug 1558242 ?