Karen:
Firefox is like Internet Explorer--u use it to browse the web. Many feel it is safer than Internet Explorer, & I for 1 happen to agree. It doesn't usually take up as much memory, either, & therefore tends to be faster. U will probably need to get some add-ons to use it w/a lot of sites, e.g., adobe flash, Acrobat reader, perhaps Quicktime, etc. I know this--a couple weeks ago I went to a site using Firefox & it screamed bloody murder that the site contained malware. I didn't get infected. My daughter, just last night, using Internet Explorer, went onto an infected site & we're gonna have to do a complete repartition, reformat, & reinstall of windows.