Fantastic, highly customized tiny addon! Puntuado con 5 de 5 estrellas

Thank you!
Is it possible to add to it input field where user can type the search pattern?

Esta valoración es de una versión anterior del complemento (0.3.120730.1-signed). 

I'm not quite sure what you mean by 'search pattern'. But maybe you should have a look at the 'fastest search' addon (https://addons.mozilla.org/en-us/firefox/addon/fastest-search/)