It has been removed, the domain is under review again by Google, this will be sorted out by the end of the day.
You should also contact Mozilla.
Usually all browsers look to google safe browsing for security. I have also had pretty frustrating experiences with getting whitelisted with them as well, no one to talk to, etc.
I've seen them put alarms on sites that were clean for a while but they don't hold a candle to how bad Siteadvisor is
Been using a red site that was labeled green for years before that and for the last 3 weeks its still not fixed back to green lol.