This used to work by default in previous versions of FF.
imdb $movie
wiki opensuse
now they don’t.
My personal favorite was
man $page
sadly that’s gone too.
Here’s how to fix it…
Open about:config and search for keyword.URL - it should be blank.
Double-click to edit and enter
http://google.com/search?btnI=1&q=
withOUT the quotes. (This is the code at Google to press the I’m Feeling Lucky button)
This will restore the previous Firefox keyword search behavior.
No restart necessary.
Enjoy.