As discussed over in https://bugzilla.mozilla.org/show_bug.cgi?id=1335457#c1 this is also broken in headless mode on windows and linux. For the initial version of headless mode on windows, I plan to leave this test disabled as it is not a high priority use case of headless.
This was fixed in bug 1373739
Status: NEW → RESOLVED
Last Resolved: a year ago
Resolution: --- → FIXED
Assignee: nobody → bdahl
status-firefox57: --- → fixed
Target Milestone: --- → mozilla57
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