this query should list more reports: https://crash-stats.mozilla.com/signature/?moz_crash_reason=~MOZ_RELEASE_ASSERT(!mForbiddenToFlush) (This is bad!)&signature=mozilla%3A%3APresShell%3A%3ADoFlushPendingNotifications#reports i checked and only a quarter of them had `nsImageBoxFrame` in their stack...
Bug 1530177 Comment 2 Edit History
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this query should list more reports: https://bit.ly/2BP21IY i checked and only a quarter of them had `nsImageBoxFrame` in their stack...