From Microsoftis Mactopia Web site: “It is recommended that Macintosh users migrate to more recent web browsing technologies such as Appleis Safari.”
Safari is Appleis free web browser that comes bundled with all new Macs, as well as Mac OS X 10.3 and 10.4. Alternative browsers are also available, including Firefox, OmniWeb, Opera, and Camino. A more extensive list of browsers is available at the Versiontracker Web site.