Rated 2 out of 5 stars

Little known fact: firefox already has this, in the form of the top right magnifying glass icon. If you have no text in the search field, it takes you to the search engine's home page.

Middle-click or control-click opens it in another tab. Ctrl-K, Del, Alt-enter has the same effect.

This review is for a previous version of the add-on (0.15).