Yahoo! Toolbar will remember your recent searches so that you can easily find the things you searched for previously. However, there are several ways you can clear the search history in the toolbar.
If you want to remove all the entries in your search history right now, but you still want Yahoo! Toolbar to remember your searches in the future, do the following:
If you want to save your recent searches while you're searching on the Web, but automatically clear the saved searches when you close your browser window, do the following:
If you want to disable the feature entirely so none of your searches are saved, do the following:
If you've disabled the search history in Yahoo! Toolbar but are still seeing items suggested when you type, your browser is saving that information. For Internet Explorer, check your options under Tools > Internet Options > AutoComplete on the Content tab.