The Primary Password is only used locally and never leaves your computer like with syncing logins. Sync uses a sync key derived from the password of the Mozilla Account to encrypt data locally before it is uploaded to the Sync server. *https://support.mozilla.org/en-US/kb/using-primary-password-sync ---- Can't you do this as well in the Security Device Manager ? You can can inspect the current login state and login and logout and change the Primary Password via the Security Device Manager. *Settings -> Privacy & Security<br>Security -> Certificates -> Security Devices In the left panel select "Software Security Device". You can find "Log In" and "Log Out" and "Change Password" in the very right panel. You may have to Zoom out the page or go full screen to make this right panel visible. The Primary Password might be blocked via a policy or there might be a problem with the key4.db in the Firefox profile folder. You can visit <b>about:policies</b> via the address bar to see if policies are active or errors are reported. *https://support.mozilla.org/en-US/kb/see-active-policies-firefox-enterprise *https://mozilla.github.io/policy-templates/