Comment 6 for bug 1291575

Christian, it might be useful to have an "allowShowing" or similar flag on password fields, which has a standard visual design and prevents predictive text and spellchecking. <http://www.lukew.com/ff/entry.asp?1941> If/when that is implemented, this dialog should be updated to use it. But I think that's really a separate issue from preventing predictive text for this particular field in this particular dialog.