Bookmark quandary

[chazter]

Hi everyone. I'm relatively new here, so forgive me if this question has already been asked many times before.
How do I remove/disable the 'Recently Bookmarked' listing? I'm not referring to the folder that appears in the 'Bookmarks' drop-down menu on the Menu Bar. I was able to right-click on that folder to delete it, and I thought that was that. But I just discovered that the listings still appear when you click on either the 'View history...' or 'Open menu -> Library' buttons on the URL bar. There doesn't appear to be an obvious way to get rid of the 'Recently Bookmarked' listings without also getting rid of the bookmarks themselves, which I don't want to do. So, again, is there a way to remove/disable that listing? Thanks for your time and expertise.
I'm running the most recent version, I think... Quantum 64.0

[jscher2000]

You can use custom style rules in a userChrome.css file to hide items on menus. I don't have a link to any specific rules, but it has come up here and on other forums before so maybe a search will turn it up.

[dickvl]

See e.g.:
https://support.mozilla.org/en-US/questions/1222037