the site is perfectly good
How do you know? have you checked all the code line by line?

Remember how blacklists work...............you get on one and you have to apply to be taken off; it is not an automatic process. Even this site was on blacklists long after it had been sold to a legitimate corporate enterprise, that was not blacklisted anywhere.

Perhaps the site's owners should take more care not to get owned, then they would stay off the lists? There has to have been a problem at some point, or you wouldn't get on the lists.

I guess the only thing to do is to contact FF and Chrome? I haven't tried, but if you pull up the site and warning there is probably a help or what does this mean option which might tell you the procedure?