The change is already removed by Bug 1897821.
Bug 1863257 Comment 9 Edit History
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The change is already removed once by Bug 1897821.
The change is already removed once by Bug 1897821. And with several fixes, the sync wait is going to be removed only on Nightly by Bug 1898650.
The change is already disabled once by Bug 1897821. And with several fixes, the sync wait is going to be removed only on Nightly by Bug 1898650.