How do I delete an entry from Firefox's address bar autocomplete?

Delete does not work, shift+delete does not work. It's frustrating to have old misspelled addresses constantly pop up and have no way to remove them. I constantly go to the wrong pages.

Windows 7.

1. Click the "View history, saved bookmarks, and more" button (i.e., the button with an icon featuring books standing side by side).
2. Click the "History" menu item in the menu that appears.
3. Click the "Show All History" button at the bottom of the new menu that appears.
4. In the "Library" window that appears, search for each relevant history item, right-click the history item, and select the "Delete Page" menu item in the shortcut menu.

Tested in Firefox 80.0 in Windows 10.