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user1378671 replied
zeeaqq
zeeaqq

i install fresh copy of windows and syc my data from firefox servers. as firefox save all data on there server. now i try to syc but no data syc and showing. before it was back normaly without any issue.

i install fresh copy of windows and syc my data from firefox servers. as firefox save all data on there server. now i try to syc but no data syc and showing. before it was back normaly without any issue.

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user1378671
user1378671

Sorry, but Sync wasn't intended to be used in that manner - IOW, as a backup medium when you reinstall your operating system. Sync is intended to be used to synchronize your Firefox data across multiple devices.

Too many users fail to realize that the Firefox Account (FXA) Password is the encryption "key" for their data; change that "key" for any reason and the data sitting in the Sync server is useless - it can't be decrypted. So when a new FXA Password is requested the users data is wiped from the Sync server to give them a fresh start without needing to create a new Firefox Account with a different email address (the primary identifier).