I'm moving to a new computer and installed Firefox. I've done a sync and everything moved over except for my container settings/configuration. On the new Windows PC, the Firefox settings look like this: If I go to the Sync settings for Firefox: about:preferences?entrypoint=fxa_app_menu#sync It says: You are currently syncing these items. But Containers is not on the list. If I go to the General settings for Firefox: about:preferences#general It says: Enable Container Tabs is checked but greyed out. If I go to the Firefox Multi-Account Containers settings, Enable synchronisation is checked. If I can't get sync to work, is there a file I can copy from the old computer and move to the new one that has all the Container conifguraiton details? Thanks