Hi Vik, that's called the Sidebar. And once you know that, you can find the Ctrl+B keyboard shortcut and other methods of access. See: Use the Firefox Sidebar to access bookmarks, history and synced tabs.

Success?

There is no such icon on my display, perhaps that is part of the problem

Hey I restarted the computer for about the fourth time and then was able to fix it. Thanks for giving me hope!

Hello,

I am glad to hear that your problem has been resolved. If you haven't already, please select the answer that solves the problem. This will help other users with similar problems find the solution.

Thank you for contacting Mozilla Support.

The suggestions given did not help. Random drosophila melanogaster like key strokes eventually recovered the bookmark icon after multiple restarts. But the problem is solved.