This extension pretty much does exactly what it says, BUT although it did show all searches when I first installed it, it has only been showing the first 13 for a while now. Clearly this is an issue since someone else mentioned it, but it’s not clear what you can do about it apart from writing a review.

Cannot edit the search engines and it looks like the developer abandoned this project. I would highly recommend you to use "Swift Selection Search" addon as a far better alternative.