After making a bookmark folder then a sub-folder, to place the bookmark into. Then I want to add a second sub-folder under the folder I placed my first bookmark into. However the main folder is not in the folder box. I must scroll through all my bookmark folders to locate the main folder I placed my last bookmark into. This problem was not in any of the Firefox versions I used before. When I updated to the newest version (last version was 62) this problem started when I made the update, and I have not been able to find a solution to this problem.

I would take screen shots but the bookmark folder closes when I move my mouse to take the screen shot.