Words Suggestion vs. 1st Result Selection Rated 3 out of 5 stars
1) Like the suggestion feature,
2) Don't like the 'selecting the first result' behavior. I didn't ask for it and it's really troublesome when you use the keyword.URL behaviour a lot. Instead of starting your search it load the first result.
1) split the addon in two (separate/select 1st row) ;
2) add a preference to manage this so we can have a check-box to toggle it.