Rated 4 out of 5 stars

Look great! But it's impossible to get access to the list of search-engines in the short search-box (which is to the right of the address-field, by default).
It's just Not Clickable.
Can anybody confirm?

This review is for a previous version of the add-on (4.0.3). 

It's working without a problem here, I also wouldn't know why it shouldn't, I've done nothing special to it. If you've got a bug better write me an email, as I can better respond to you than here. Also try to temporarily disable your extensions to see if it's caused by any of them.