What can I do to get Firefox "smart" address prediction to work how it did before today's "up"date?

I “up“dated Firefox today. Now I’m annoyed to find that when I start to type an address in the address bar, such as “Fl”, which in the past would have guessed “Fluther.com” so I could get to Fluther and my other usual sites with 2–4 keystrokes, now instead five different things with “fl” somewhere in their address (not starting with it), so now I need to use the mouse too to select which one I mean, and the “right” one is not just the site I want to go to, but some random sub-page I do not want to go to, such as the 2009 annoying question http://www.fluther.com/56214/is-travel-insurance-a-requirement-to-travel-to-russia/ .

ARGH!

How do I restore it to matching based on the start of the address, the way it used to?

Grrrr…