A dialog box will popup. For Netscape Navigator, version 6, click on the Edit menu and then click on the Preferences item. A dialog box will popup. This will get rid of previously visited all web addresses as well as those concealed in the location pulldown menu at the top of the browser window. If you have an older browser, click here for further instructions .
Browsers also store visited web site addresses in the pulldown address bar.
If switched on, the AutoComplete function will type out previously visited sites if you type the first few letters of the address. This cannot be turned off in earlier versions of Netscape Navigator. Older versions of Web browsers don't have this feature built in. Then click Properties. You should also clear your cookies.