Rated 5 out of 5 stars
Very good extension!
Sure - wherever possible I've used localised strings from Firefox but there are some strings for the extension that could be translated.
Have you ever done a translation before? If you go to the 'view source' link for this extension (bottom of the page) and expand the 'locale/en-US' directory, the strings in all those files need to be translated into Italian.
Unfortunately I only speak English so I'm no help with translations :|