I think i found the culprit WordPress plugin…. https://wordpress.org/plugins/lazy-load/ and hopefully i’ve solved this Chiperoni question.

Why don’t Firefox and Chrome show embedded images ? While the images do show on Safari and MS IE?

https://wordpress.org/support/topic/embedded-flickr-photos-not-showing-in-chrome

http://chiperoni.ch/wordpress/2010/04/buildings-to-see-in-basel/