We users of Firefox (and the Firefox-based Flock) are spoiled: It’s easy to slip lazily into the assumption that every cool browser tool premieres as a Firefox add-on. So I managed to remain ignorant of Inquisitor, an interesting Safari plug-in that brings features for speeding up Web searching directly to the browser’s search box. But as of today, Inquisitor is also available in beta versions for Firefox and Internet Explorer. And if you use either of those browsers, it’s worth a gander.