That doesn't sound very good, it could be that certain Firefox settings are enabled which stops 1Password X from being able to write to Firefox’s local storage which stops the extension from working.
Can you check that “Always use private browsing” and “Never remember history” are not both enabled simultaneously. At least one of these settings needs to be disabled for the extension to work.
If you're still experiencing troubles, please reach out to us at support@1password.com.
