See:

• https://support.mozilla.org/kb/Deleting+Bookmarks

You can open the Bookmarks Manager (Library) via Bookmarks > Show All Bookmarks and remove a bookmark via the right-click context menu or via the Organize button on the toolbar in the Library (it is the first of the three buttons).

Thank you for your help. Much appreciated! I was able to delete the bookmarks in the "library" but not the bookmarks at the "1st. Level" When I open bookmarks, a long list presents itself. I click a page and am directed to that page. In the URl is a blue star for editing the bookmark. I click on remove this bookmark, but it remains. Thank you

Is this about the location bar drop-down list?

• https://support.mozilla.org/kb/Clearing+Location+bar+history
• https://support.mozilla.org/kb/Cannot+clear+Location+bar+history