Specify link, because when we use your link we get:
Server not found
Firefox can't find the server at www.domainname.ext.
Check the address for typing errors such as ww.example.com instead of www.example.com
If you are unable to load any pages, check your computer's network connection.
Facebook always give many problems.
Need check URL with help Sharing Debugger
Then you can see problem, or provide correct link and we will check it too.