I hope that I can mumble my way through this...
I run a SMF Forum and have no problems with any Browsers except for Firefox.... I like Mozilla Products a lot and would like to stay with Firefox..
I have uploaded two images, one with Chrome showing the image correctly and the other image using Firefox which doesn't show the image.
Is there a setting that I am Missing ?
Chrome.jpg
Firefox.jpg
I'm not sure if this is your problem, but if you use Cloudflare and have image optimization turned on. It converts the image to a webp format.
Windows Mail App won't display Wepb images, maybe you're expericing something similar to this.
Does everything look OK after posting?
Also: Are all .jpgs affected, or only that one? (Might be an issue with that particular file?)
Firefox will block trackers, or anything that looks like a tracker. Might be something in image header it doesn't like. Can you attach jpg here?