It’s been noted since 9/5/15 that any images loading on yahoo’s website is refusing to load. This has been traced to the HTTPS screening function in Avast! AV.
Disabling the HTTPS scanning option patches the issue but can not be considered a permanent fix for any reason.
https://support.mozilla.org/en-US/questions/1082264[1]
I posted this to support two days ago, no response, not even an acknowledgement.