Sync is for multiple devices. You will need to get on another device, log into your Firefox account, and the data from the 1st device will sync and be visible to the 2nd device. https://support.mozilla.org/en-US/kb/how-do-i-set-sync-my-computer https://support.mozilla.org/en-US/kb/how-do-i-choose-what-information-sync-firefox Example in screenshot. I'm in Waterfox on ProBook-455-G9-Tumbleweed and I cannot see it in sync, but I can see other devices and versions for Firefox.