This may be from sync.

Type about:accounts<enter> in the address bar. [57+] https://accounts.firefox.com/settings

and shut sync down.

If this is not the case; 1) Do not respond to it. 2) Create a screenshot for us to check out;

In order to better assist you with your issue please provide us with a screenshot. If you need help to create a screenshot, please see How do I create a screenshot of my problem?

Once you've done this, attach the saved screenshot file to your forum post by clicking the Browse... button below the Post your reply box. This will help us to visualize the problem.

Thank you!

Hi BrownieAndie, after installation, there is an extra page encouraging you to create a Firefox Account and/or share data between your different installation of Firefox. That's optional, and you can just close that tab or click the Home button or use the address bar to move onto what you want to see.

On the new tab page and built-in home page, you may see snippets describing different Firefox features and Mozilla services. There's a "gear" icon in the upper right of the page to select which content you want in the page.

Hope that helps.