i will tell you how to add
then select the google custom search in search button , to use oogle.co.nr
OpenSearchFox, is a simple unobtrusive extension for Firefox that makes an OpenSearch plugin from any search form.
first install this plugin OpenSearchFox
then go to www.oogle.co.nr, then in the search box of oogle.co.nr right click and add then select the option add opensearch plugin
then this type of window appears

then select the google custom search in search button , to use oogle.co.nr
Unlimited freedom, unlimited storage. Get it now