The Mozilla family of browsers (including Firefox, Netscape, Camino, Beonex, and Mozilla itself (as well as some others) have the ability to load search plug-ins in addition to factory equipped ones like Google and Yahoo. They can thus also be used to search Saugus.net.
By simply following this link (or this link if you have a really old browser), approving the addition of the new search engine to the search bar, and authorizing the download you will get the Saugus.net search plug-in installed on supported browsers.
If you do not currently have a supported browser, Firefox is freely available for most platforms.
You may also find our similar Saugus.net Sherlock plug-in useful.