You may need to do a clean uninstall of Firefox and reinstall.
I recall one other member who had the same problem with getting the bookmarks. After many attempts that was
the solution....a reinstall after a clean uninstall..that means removing your Firefox profile after uninstalling using the Add/ Remove program.
The easiest way after uninstalling Firefox to find and delete the remnants including your Firefox profile is do a search using the search
box in the Start menu. Search for Mozilla and Firefox then send the files to the Recycle Bin/ delete.
“Every atom in your body came from a star that exploded and the atoms in your left hand probably came from a different star than your right hand. It really is the most poetic thing I know about physics...you are all stardust.”― Lawrence M. Krauss
A 1792 U.S. penny, designed in part by Thomas Jefferson and George Washington, reads “Liberty Parent of Science & Industry.”