In order to simplify the development process of Bug 1120684, the "signon.relatedRealmsEnabled" pref will be disabled. After landing the blocking bugs for this ticket, we will need to re-enable the pref.
Bug 1699698 Comment 0 Edit History
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In order to simplify the development process of Bug 1120684, the "signon.relatedRealm.enabled" pref will be disabled. After landing the blocking bugs for this ticket, we will need to re-enable the pref.