Why don't some images load for me?

[usonian]

4. The computer detectives here are pretty sharp. But need more information.

All my "remote" computer help was a nightmare. So many questions to ask.
If you can at least give examples that don't work for you, people can try.
That would give some clue.

There are many steps between a server and a browser, including cloudflare, which is becoming the internet, since it routes, and caches, and sometimes breaks, so much content. This being near election time, I suspect that a lot of nasty stuff is going on that we don't hear of, and cloudflare is probably trying to block it.

And sometimes, images don't load because of slowness SOMEWHERE on the vast internet.

FWIW, I have used imgbb and postimage, and have only experienced slowness.

Something about the content?

OH, and as a data point, only my i-devices will show a preview of twitter.
On all the desktops, using Firefox, only the links show.
This *has* to be due to one of the countless trash-blockers I use.