Do you mean clearing your search history?
Firefox: Tools > Clear Private Data
Internet Explorer: Tools > Internet Options > General (tab) > Click the "Delete" button in the Browsing History section.
I think he is providing a link on how you can delete the data, because the link he gave us shows you how to delete the link history I believe.
I did actually want to know how to delete the address bar data. I updated my page when I found out how to do so.
If you are looking for a way to stop the default page that launches when you start firefox, go to tools options and set "when firefox starts' to "show blank page".
On a related note, the address list in Inernet explorer can be modified from the registry. Its a bit complicated,but you can use it to play pranks or something. Or to program something to clear the data automatically or something
Sorry about my english.
Try find this on registry for internet explorer
Then Delete the value.