Vista Home Edition OS Firefox has been my default browser for years. I have recently tried to disable Yahoo tool bar and in the process somehow lost my Firefox Home Page and the ability to log on to my page. After previous Mozilla upgrades, I could sign in to my account and be at my home page. Now I get the Google search, the Firefox challenge and restore Previous session, but link to sign-in. The Yahoo Took Bar is still there and previous tech support remedies have failed. I cannot find any reference to the Yahoo Tool Bar in the add-ons.