I would love to see if sync would work on cookies exceptions. there's already a few ideas also about this:https://connect.mozilla.org/t5/ideas/cookies-exception-list-configuration-synchronization/idi-p/6200https://connect.mozilla.org/t5/ideas/sync-ex...
Please consider implementing this. Syncing “Delete cookies and site data when Firefox is closed” without exceptions often causes inconvenience and unexpected loss of progress.
