The site has been updated to support HTTPS through Let’s Encrypt! – This means that forum logins should no longer make Firefox and Chrome grumpy about being insecure.
The front page may take a while to be fully compliant though, it’ll take some time to convert all the links to use the new urls, so you’ll probably see the “partially encrypted” or “parts of this page are not secure” message at the top for a while.
The forum has also been updated to the latest version of the software – send me a message somewhere if you have issues with it behaving for you and I’ll see what I can work out. The required “dark” theme will be updated/enabled in a day or 12.