(In reply to Alice0775 White from comment #9) > Not duplicate. Because of sidebar.revamp is false (default) in this bug. It's being treated as a duplicate because of how this property is now stored - which is entirely in session restore - so it doesn't matter practically whether a user is using the new or old sidebar the fix is the same (and since it is caused by the work in bug 1892033, which the duped bug was also regressed by).
Bug 1922777 Comment 10 Edit History
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(In reply to Alice0775 White from comment #9) > Not duplicate. Because of sidebar.revamp is false (default) in this bug. It's being treated as a duplicate because of how sidebar state properties are now stored - which is entirely in session restore - so it doesn't matter practically whether a user is using the new or old sidebar the fix is the same (and since it is caused by the work in bug 1892033, which the duped bug was also regressed by).