Please try these steps: 1. Make a note of your existing home page setting. Then restore the default home page setting - see [https://support.mozilla.com/en-US/kb/How%20to%20set%20the%20home%20page?s=home+button&as=s#w_restore-the-default-home-page Restore the default home page]. 2. Close all but one of your Firefox windows. 3. Go to your former home page address (which you noted down in the first step). Set it as your home page - see [https://support.mozilla.com/en-US/kb/How%20to%20set%20the%20home%20page?s=home+button&as=s#w_set-a-single-web-site-as-your-home-page Set a single web site as your home page] You should be good now. To test, select the Home button/icon.