Where are you seeing that untrusted connection message? I don't see it in Firefox 3.6.8 myself. https://www.robertabbey.biz/smart-lighting/default.aspx

There isn't anything that Firefox can do when a website owner has multiple different domains that re-direct to a *.biz domain, that's the way they setup their website and domain names with the DNS servers and their webhost.

i cannot even get to robertabbey.com. that is the website. i dont know robertabbey.biz. firefox does not give me choice; i get redirected to .biz.

Does the hyperlink I provided work for you? Is that the content you are looking for? Or is that not the correct website?

If you have some sort of security software on that PC the is giving you that "untrusted connection" message and also blocking the redirect, you need to figure out what is doing that and then try to fix it. IMO, that issue isn't the fault of Firefox, unless another helper on this forum can tell us if they also have that problem with the re-direct not completing for them too, or it's just your configuration.

I don't run a software Firewall (I have a hardware Firewall for my LAN), just a basic Anti-Virus application, so I don't see a message like that; I do use NoScript which doesn't raise a "flag" about any dangerous XSS being done in that re-direct, so I don't see that as a security issue.