Firefox Home Page Search Randomly Goes To Change Search Settings

Inadvertently hitting Up-Arrow just before striking the Enter key causes the search to select last drop down menu search option, i.e. “Change Search Settings” instead of searching the web. This could be intentional but more often than not it’s an annoyance. It also wipes the original search query forcing it to be retyped. In addition the “Change Search Settings” option doesn’t get highlighted to give you a clue that it is going to Change Search Settings.