I wonder if this relates to bug 1799421 (and if the patch there might help to avoid this). In any case I would not think that this is very relevant for normal usage - this seems to be specific to a very early shutdown while the browser is still starting.
Bug 1814104 Comment 27 Edit History
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I wonder if this relates to bug 1799421 (and if the patch there might help to avoid this, though I doubt it, there is probably more to it). In any case I would not think that this is very relevant for normal usage - this seems to be specific to a very early shutdown while the browser is still starting.