Firefox's autocomplete list falls on top of the drop down list of InputSuggestAjax

I have an InputSuggestAjax and have autocomplete turned on in Firefox. When I type a value in hte InputSuggestAjax that I have typed previously, the browser pops-up a dropdown list on top of the suggest list of the component. This is really confusing.

A fix could be to add autocomplete="off" to the html input text or make it possible to specify it on the form.