Yes, you set up Sync once on each device, with a password. You can configure what you want to sync (bookmarks, tabs, preferences, ...). I only sync bookmarks, t

Yes, you set up Sync once on each device, with a password. You can configure what you want to sync (bookmarks, tabs, preferences, ...). I only sync bookmarks, those just appear automatically. I never tried syncing tabs. I see now there is a "Sync now" command in the old Alt-menu, and a "Synced Tabs" window in the new hamburger-menu, but I never used those. Screenshots: https://imgur.com/a/QkhNQ https://imgur.com/a/QkhNQ https://www.mozilla.org/en-US/firefox/features/sync/ https://www.mozilla.org/en-US/firefox/features/sync/