Add fefoo to Opera

Copy this url to clipboard. You will require this later.

URL:
Right click this --> and select Create search...
1. Click on the Details > > button.
2. Copy the URL you copied to the Address field.
3. Add fefoo in the Keyword field.
4. Check the option Use as default search engine.
5. Make sure Address field is http://fefoo.com/#SearchDefault?q=%s
6. Click OK once you are done.
Try a command search to see if fefoo is working, search for ":movie dark knight". If you search without a command, google search will be performed.
Congrats if you got it working.