I can't access Sealine through Firefox either, I get the same red page as Mousedog, but the browser freezes. I have to use google chrome, which I hate.
Is there anyway that this can be stopped, I really don't want to have to change security settings, because I have it set like this for a reason. Also, a couple of times now when I log onto Sealine, Avast pops up with a warning saying threat detected and that it has blocked something from downloading a file. It doesn't happen all the time, but it does happen, and only on Sealine.
I've run several scans on my system with Avast and Malwarbytes, so far nothing, I'm scanning again with Sophos Anti Rootkit, but I don't think it'll find anything. Is this related to the software Simen was talking about, or is it something different?