If you have lost your recovery key then unfortunately there is nothing to do, it can be regenerated but that will cause all data in sync to be deleted. You could try syncing your phone, then disconnecting it from sync, create a new sync account and connect your phone to send the data to that account, but there is a potential for the data to be lost there as well. sorry.

Try [/questions/947177]

Thank you. This worked as described. I was afraid to remove the account from my mobile device because it was the last copy of my bookmarks. I was going to use this as a last resort to enter them all by hand. Thanks to you my problem is solved and all old bookmarks have been restored on my new desktop Firefox with the new updated recovery key.