Firefox now has a Speed Dial you can use in its New Tab page, and it automatically populates it with sites that you visit often. These can then be pinned in there if you always want them visible.
But suppose I don't want to wait for a site to show up in there before I can pin it. Is there a way to manually enter a URL that I want to show up in the Speed Dial?
You can manually add sites to the speed dial by drag'n'drop from your bookmarks or your history onto one of the speed dial slots. Use Ctrl+B or Ctrl+H to open the list of bookmarks/history.