In firefox if I type a bunch of words instead of a web address and hit go it does a google search.
You can install addons for other search engines and they appear in a list below the address bar and you can click those to perform the search on that engine instead.
Is there a way to make one of these search add-ons the default?
about:config
screen that seem relevant to this (search the config page for "search" and you'll see them), but I've never been able to make them work with anything other than Google.