
Behind the screen: what was happening when we type some query in firefox address bar? When we press go or enter the firfox+google campaign serch url send to open dns server. which was getting detected by opendns and then we are getting redirected to open dns's own google search page. Its because open dns uses filters for query sent via firefox and returns results on own page.
So how to get ride on this? Goto forfox and type about:config.
Now search for "keyword.URL" and edit its value by to "http://www.google.co.in/search?hl=en&btnI=I%27m+Feeling+Lucky&meta=&aq=f&oq=&q=".above is google search page query for I'm feeling Lucky or you may put any query in place of this just keep in mind to place query "&q=" or your "&search=" at the end of query string.

I hope this is useful for you! Comments and feedback appreciated!