It most likely is, but we have no way of correlating it to you. If you recall the date (and time, but hopefully your Firefox doesn't crash multiple times a day!) that it happened, you should be able to locate it under "Submitted crash reports" in `about:crashes`. If you could paste that crash id here it would let us locate it.
Bug 1679201 Comment 5 Edit History
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It most likely is, but we have no way of correlating it to you. If you recall the date (and time, but hopefully your Firefox doesn't crash multiple times a day!) that it happened, you should be able to locate it under "Submitted crash reports" in `about:crashes`. If you could paste that crash id here, when you get a chance, it would let us locate it. Thanks!