Rated 4 out of 5 stars

I really like this addon a lot. But it is useless to me if I cannot add my own search engines. Right now I use the 'add to searchbar' addon together with the 'scroll search engines' addon. Whenever I want to look for something I just type in the searchbar and scroll to the desired search engine. It's ver fast and very effective.

So my question is, can you add your own search engines? And if so, can you scroll through them, or use a similar technique?