Just an Idea
Are you using an add-on that blocks third party code from executing in the web page link that you are viewing in your browser - Face book links may being blocked as they are being hosted by a different server at your point of access.
No probs; Firefox/Win 7 Pro or Linux Mint 18.3/Epiphany for me - different units, I'm not running a virtual PC
Run your browser with any add-on's disabled as an experiment.
CAT III