You still have "an address" bar. You type `o` and start typing to search for history, bookmarks or enter new URL all in unified list. Usually a few chars + TAB is enough. This unified list pops from the bottom of the browser window and it respects your color scheme as well.
Of course there is `s` command to search any of your installed search providers and you can do all of this in new tab, window etc.
Pentadactyl is what keeps me using Firefox. When that stops working, it will take me back to stone age when it comes to speed of navigating and researching content online.
The good news is that if you don't like the new look of firefox, you don't need to see it: https://addons.mozilla.org/en-US/firefox/addon/classicthemer...