Organize Bookmarks was renamed to Show All Bookmarks.

This reply did not answer my question. How do I delete a bookmark?

See:

• https://support.mozilla.com/kb/how-do-i-use-bookmarks
• https://support.mozilla.com/kb/Deleting+Bookmarks

If this is in a new recently bookmarked page, go to bookmarks pull down menu, go to recently bookmarked, go to the right and highlight the bookmarked page. Now right click with the mouse (brings up a menu) scroll down to delete and click. This should remove that bookmark or page. The same thing can be accomplished if it's in your bookmarks toolbar. Just right click, scroll down to delete on the pulldown menu, and click. Hope this does the trick for you.

This did not work. When I right click it opens the page; no drop down menu. I have a wireless mouse and an IMAC if that matters.

Can I get the old format back before this "upgrade" took place?