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How can I force migration of data from the old sync to the new?

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  • Last reply by John99

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I have two old instances of firefox (version 18 and 24) with sync set up; these are not accessible. How can I get the data from that account migrated to the new Sync backend without disconnecting these clients from Sync?

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The old and new sync use the same backend but that may not help you here; if for instance; you were hoping to do directional merges.

Note the old and new syncs use a different account, and that the new sync only offers a merge option.

Relying on sync alone to backup bookmarks could result in all devices having corrupt bookmarks listings. If you have bookmarks involved I personally strongly recommend you manually back them up before making any sync changes, and thereafter do so at regular intervals - say every 2nd week. Sync is not good at handling large changes and large merges of bookmarks, corruption or duplication could occur.

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Note there are plans to deprecate the old sync