Waterfox cannot find Contacts List for Forward or Reply, But they are all there undr the "Contacts" Tab.
When attempting to Forward or Reply an email, neither typing in the address window nor clicking on the (+) plus sign at the right end of an address window (which brings up a window stating "no contacts found") produces any listing of contacts. Yet all the contacts I have in there are listed when clicking on the "Contacts" Tab above the email area. I never had this problem until Waterfox 9.0 update (AFAIK).
ప్రత్యుత్తరాలన్నీ (1)
Unfortunately Waterfox is an unofficial project, and as such, we cannot provide support for it. Please go to their website http://waterfoxproject.org/, and ask for support there.