Another suggestion from Mozilla Russia forum - if the search string in the list of blockable items contains multiple words show entries that contain all of these words. For example, searching for "object doubleclick" will show everything of type "object" with "doubleclick" as part of address (or document domain). Sounds like a nice to have to me, but I'm not sure how far I should go with making the search more flexible. Any comments? I didn't add this to the roadmap yet.