Hi wmcairns, what does the prompt look like? ''Here's a guess:'' If Firefox is asking for a '''Master Password''', did you save a login for either: * Your Firefox Account used for Sync * Your home page In that case, Firefox will ask you to unlock the Password Manager by entering the Master Password before automatically logging you in to the service/site. If your Firefox was ever connected to a Firefox Account, and you do '''not''' want to use Sync, you can disconnect it on the Options page.