Firefox, the Browser
Firefox is a browser written by the Mozilla group. There are Mac, Linux, iPhone/iPod, and Android versions.
Firefox includes features that other browsers have copied. Search tools are built into the toolbar. Firefox allows you (no administrator needed) to add extensions to your browser. Extensions are add-ons that add functionality. Go to the Firefox add-ons site to see available extensions, personas, themes, and a brief description of what each does.
To run Firefox, go to Start | All Programs | Mozilla Firefox.
You can download Firefox from Mozilla.org.