I hit this on 107.0b3 a bit ago. TB had presented me with the OAuth2-type username and PW dialogue but I was in the middle of shutting down TB when it hung and then crashed. SO either an OAuth2 or PW manager issue. https://crash-stats.mozilla.org/report/index/0a3b7415-dc4d-48d4-ba59-1eccf0221104
Bug 1505660 Comment 43 Edit History
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I hit this on 107.0b3 a bit ago. TB had presented me with the OAuth2-type username and PW dialogue but I was in the middle of shutting down TB when it hung and then crashed. So either an OAuth2 or PW manager issue. https://crash-stats.mozilla.org/report/index/0a3b7415-dc4d-48d4-ba59-1eccf0221104