Ad Limiter is descended from our previous SearchRater add-on, now with a new ad-limiting capability.
There is a Google Chrome version of this add-on, available through the Chrome Web Store.
Ad limiting is currently supported for Bing, Google, and Yahoo. (Blekko and DuckDuckGo have very few ads.) Search rating is supported for Bing, Blekko, DuckDuckGo, Google, and Yahoo.
Search rating (which requires communication with the SiteTruth server) is disabled in Private Browsing mode.
For Ad Limiter versions prior to 1.4, the rating icons will sometimes not appear for a search result page. Refreshing the page will usually make the icons appear.