This is something... but it isn't perfect. The address bar is still not purely an address bar. It still defaults to sending a query to a search engine (I like to use this to search for partial URL matches, for example, navigating git repos that I use frequently). That's what the search bar is for. Bah humbug. Even with all these options set, FF still encourages confusion between URLs and searching.

I'm not sure I understand.. there's an internal search (tabs, history, bookmarks) which sounds like what you're doing - there's no search engine used for this. Or do you mean the Search suggestions (Settings -> Search -> uncheck "Provide search suggestions" to disable, some of these suggestions are FF generated)