Thanks for the advice, tahra. Pictures in The Process failed to appear for me yesterday, both in Chrome and Samsung Internet browser (the latter stopped working with eBay a few months ago too) on my Samsung (Android) tablet.
I'm posting this in case anyone else is having difficulties.
I tried all the suggestions given, but couldn't locate any reference to allowing mixed or insecure content. I looked in Settings, tried the Desktop site, allowed Automatic Downloads, all to no avail.
So I am now using Firefox, which works fine!