Can you attach a screenshot?

• https://support.mozilla.org/en-US/kb/how-do-i-create-screenshot-my-problem
• use a compressed image type like PNG or JPG to save the screenshot

You can check that these pages aren't set as multiple homepages.

You can check the homepage setting.

• Options/Preferences -> Home
• https://support.mozilla.org/en-US/kb/how-to-set-the-home-page

Firefox supports multiple homepages separated by '|' (pipe) symbols.

Is it the Bookmarks Toolbar?

This article has more info on how to display/hide the bar, remove unwanted bookmarks so you can put other stuff there, etc.: Bookmarks Toolbar - Display your favorite websites at the top of the Firefox window.

Yes it is. Thank you!