Rated 5 out of 5 stars

First instal its perfect companion
Omnibar Plus
Then use the settings to re arrange how you wan the suggestions to show and if you enable autocomplete or not, you can have it back like firefox have as default or your own like.
All the low star reviews are because of this so STOP, install Omibar Plus, fix the behavior, then enjoy life again.

This add-on makes what Mozilla refuses to do despite being copying and copying Google Chrome UI