Location Bar search
From MozillaZine Knowledge Base
When you type a keyword into the Location Bar, Firefox takes you to the top Google result for that search by default. However, by modifying the about:config entry keyword.URL, you can change this behaviour. Here are a few example values:
- http://www.google.com/search?btnI=I%27m+Feeling+Lucky&ie=UTF-8&oe=UTF-8&q=
- Google's "I'm Feeling Lucky" (default)
- http://www.google.com/search?ie=UTF-8&sourceid=navclient&gfns=1&q=
- Google "Browse by Name" (Automatically takes you to sites with a clear match, else performs a Google search)
- http://www.google.com/search?ie=UTF-8&oe=UTF-8&q=
- Google Search (Google search results page)
For more advanced search capabilities, you may want to look into keyword searches and the Search Bar.