do you know how keyword search in firefox by default takes you to google?

Change default keyword search in firefox:

By default, when you search through a keyword it takes you to the google search engine.
This default keyword search is set in firefox's "about: config" as,

 Preference Name   Status          Type                 Value

  keyword.URL       default        string       http://www.google.com/search?ie=UTF-8&oe=UTF-8&sourceid=navclient&gfns=1&q=

You can change the default value to your required search engine..............

Thus you can change the default keyword search in firefox.