There are some major internal changes in fefoo. Now commands work for search engines as well, you can use a command like :twitter [search term] to search on twitter. I have tried to expand the way you can search. Use :wolf [search term] to search using the Wolfram|Alpha search engine. It makes it really easy to search using any search engine. This effectively makes it possible to target any of the 200+ search engines.
I also added a new twist to the command. You can use semicolon instead of a colon, and it will directly take you to the search engine and turn off the toolbar. If you know you want to search using DuckDuckGo use the command ;duckduckgo [search term] and you will be directly sent to the search engine and the toolbar will not be show.