I'm not entirely familiar with what omnibox does, but there're a few search bar addons, and quickly testing on 11, typing "whuh" in the navigation bar goes to a

I'm not entirely familiar with what omnibox does, but there're a few search bar addons, and quickly testing on 11, typing "whuh" in the navigation bar goes to a Google search too. Personally, I just use vimperator (the clones of which on Chrome are…abysmal?) so I can o[pen]/t[abopen] and then type a search term (w/ customizable engine) or a URL. … Memorywise, the recent FFs are much better. Usually problems are caused by extensions.