Hi Eugene, Sync should be able to retrieve the data you stored from your other installation of Firefox. You can check what data is in the Sync cloud for your Mozilla Account using the About Sync add-on: https://addons.mozilla.org/firefox/addon/about-sync/ After you install the add-on, you can type or paste '''about:sync''' in the address bar and press Enter to load it. The page shows each category of data currently found in the Sync cloud. Can you see your data listed under bookmarks and crypto (this one is for saved logins)? If not, did you make any backups of the data on your old computer or do you still have access to it?