You may have been very comfortable using the Bookmarks Toolbar for quick and easy access to your favorite bookmarks and the toolbar is now missing. You may have simply turned off the option to display the Bookmarks Toolbar.
There is also a possibility that you have hidden the Bookmarks Toolbar by removing the check mark in front of it. To unhide it, you can right-click empty area on the Navigation Toolbar and restore the tick to enable the Bookmarks Toolbar. Just observe and implement the procedure below.
If the above procedures still have not bring back your favorites toolbar then we advise seeking help from an expert, either in-person or through a remotely connected tech support service agent.