Recent failures are all https://bugzilla.mozilla.org/show_bug.cgi?id=1750396. The message seem in Comment 4 is a false positive which also appears on green runs, the real issues here are wpt manifest changes.
Bug 1723277 Comment 5 Edit History
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Recent failures are all https://bugzilla.mozilla.org/show_bug.cgi?id=1750396. The message seen in Comment 4 is a false positive which also appears on green runs, the real issues here are wpt manifest changes.