With Sync feature in Firefox, you can able to access your bookmarks, tabs, history and passwords on multiple devices. To use Firefox Sync, you need to sign into Firefox account. If you’re using on only one device, then you may not need Sync. Upcoming Firefox 60, which has moved Cookie Settings into Site data section and allows to open address bar results in a new tab,, offers a hidden preference in about:config to completely disable Sync and Firefox Account.
What this means is when toggle this preference, ‘Sign in to Sync’ item in the menu, and the ‘Firefox Account’ section in the preferences will be removed from Firefox browser and won’t appear unless you change that preference value to true.

Completely disable Firefox Sync in Firefox 60
1. Visit about:config
2. Create a new Boolean preference called identity.fxaccounts.enabled and set its value to false.

3. When you restart the browser to see sync menu item and Firefox Account section in Settings will no longer appear. [Thanks Soeren].
What’s your take on this change?