options,privacy and settings: Autofill disable auto-filling of forms on webpages?
or maybe:
Use a prediction service to help complete searches and URLs typed in the address bar
When in doubt you can always use Software Remove and get rid of the browser, then install a new one.
I would copy the browser folder (with your content) to a directory you name, just for reference.
Apple Safari, Opera, Mozilla Seamonkey (their name for the continued Netscape, sort of like Netscape Rev. 4.79 with a new skin) are good alternative browsers.