I just checked crash-stats and this bug also affects FennecAndroid which doesn't use Application Update so there must be something else causing this than Application Update... perhaps a cache hasn't been invalidated.
Bug 1403348 Comment 79 Edit History
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I just checked crash-stats and this bug also affects FennecAndroid which doesn't use Application Update so there must be something else causing this other than Application Update... perhaps a cache hasn't been invalidated.