In Vimperator, press / and do a search. If there are matches, all will be highlighted.
My question is how to clean these highlights in a decent way.
My current approach is to press / again, and type in a random string like "abcdefgh", enter, and press Esc to clean the red warning in command window.
The :nohlsearch command will remove the search highlights. You could map this to a key if you use it frequently.