You might check settings>privacy&security and see if you accept remote content. I'm guessing the graphic at top of the message is embedded, allowing it to be seen. Just a guess.

Thanks for your reply. I tried that too, but no luck. I am taking it up with Rumble.

i have the same issue, where it probably just shows the "alt=" text instead of the picture and this probably already started 2 months ago... i have checked everything from here also, but still nothing:

https://support.mozilla.org/en-US/questions/996668

edit: i even tried to remove the sender from the "allow" list and then noticed that it has some new separate options for "img.sender.com" and "static.sender.com" sites etc, but adding all of those, PLUS the sender email also, i still get the same exact blank text instead of the actual image....

"not" very annoying at all......

so if it wasnt a recent update, then it probably was fixed by the party who sent the emails... aka it was maybe the issue with their server and seems to be fixed now... not really sure why did it take 2 months tho...