Following on from DOC's reply
I don't see any security warnings using Chrome but I can sort of replicate
OP's warning by changing from https:// to http:// in the web address bar.
csv8 - if you log in to FF using a Bookmark or Desktop shortcut, check that the URL (of Bookmark/Shortcut) is prefixed with
https://. Warning should go away if you use
https://www.fordforums.com.au
The only thing I can't replicate is the red triangle icon, ie, I only see a circled "i" icon if I browse FF using
http://www.fordforums.com.au.