Disable Firefox search when site down

Question

Is it possible to disable the automatic search when you type a full URL in the location bar and the site is not reachable?

I can't figure out the name of the feature so I can find more info about... I'll give an example:

1. I type http://tmp/ in the location bar to load a local development site
2. My local Apache is down so the site is unreachable
3. Firefox loads http://www.tmp.com
4. I start Apache
5. I have to type again the original URL

This is true even when Apache cannot find another site: the last attempted URL remains in the location bar.

Answer 1

For the records, the feature is called "domain guessing":

http://www.mozilla.org/docs/end-user/domain-guessing.html

The link explains how to disable it.