KristiS posted at 2:19AM Fri, 30 December 2016 - #4293810

Or site and FireFox is not really compatible since FireFox's latest update. The problems are inconsistent so it makes it very hard to track down and fix the problem.

Your shop site seems to be okay with Firefox (green lock, verified by GoDaddy.com). The community part is not safe; there are some elements whiich come from a non ssl-site. I'm sorry to not be more helpful, but Firefox doesn't go any further than stating that mixed contend is "unsafe".