Inquisitor is an free add-on that used to be Safari-only and is now available for both Firefox and Internet Explorer. It was recently bought by Yahoo and, as a result, is now based around the Yahoo search platform, meaning search results are restricted to this network. It's currently only in beta - and you have to login to the Mozilla add-ons website in order to download - and we couldn't get it working on our main desktop-based Firefox 3. Simply never appeared in our Add-ons manager.
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