Want to tweak how Firefox’s default search options react to you in the browser? The SearchLoad Options extension should do the trick then.
Options include clearing the searchbar and resetting the search engine after each search. A time delay can be set in order to reuse search strings or search engines before changing the state of the searchbar.
Search results can be loaded into the active tab, a new tab, or a new background tab. An option allows new tabs to be created regardless of whether the current tab is blank. New tabs can also be created by using the Alt key.