Works you've already kudos'd or bookmarked are hidden from search results. Requires "AO3: Kudosed and Seen History" by Min_.
A very quick script to hide bookmarked and kudos'd works from search results. This script requires Min_'s AO3: Kudosed and seen history to function and performs a similar function to a setting already present within their script, but this script will only hide fanfics from works/tags searches and not from searches through user bookmarks.