Rated 3 out of 5 stars
I give it 3 stars because you have to manually type your search engine. I would like to see it in "Seamonkey style": when you want to start search from the location bar, you click "Search" button (the right place for search engines indication and choice).This review is for a previous version of the add-on (0.3.1b).
This could be a good idea
I have not used Seamonkey so may not be aware of the usage pattern you are talking about. Do you insist that to perform search you need to click a button instead of hitting "Enter"? Moreover when we are searching for something for example when you type multiple words, chanves are that you need to search.
I could experiment with providing an extra button to perform search but it may or may not make the final cut. Thanks for the suggestion.