In Firefox type about:config in the address bar and press ENTER. Search for Keyword Locate and double-click the entry for keyword.URL Modify it by add the below set of values : Yahoo: http://search.yahoo.com/search?p= Ask: http://www.ask.com/web?q= Bing: http://www.bing.com/search?ie=UTF-8&oe=UTF-8&sourceid=navclient&gfns=1&q= Google: http://www.google.com/search?&q=