Assegnate 5 su 5 stelle

The problem with the search.
I can not write a full word in the search box. In the "default theme" everything works. Help, please. In what may be the reason?

Questa recensione riguarda una versione precedente (1.4.3.1-signed) del componente aggiuntivo.  L’utente ha inserito altre recensioni su questo componente aggiuntivo.

Hi Cm-96,
I am using every day the search box with Noia Fox and I have no bug with this feature.
Have you installed an add-on that could change the search box display? You can post the answer in the support site : http://forums.mozillazine.org/viewtopic.php?f=48&t=2230157
Post me the list of all your add-ons, with a screenshot of the bug.
If this bug comes from an add-on, perhaps I will corrected it.