Thanks for the info. I wasn't aware firefox would block the images. I don't have any specific tracking on the images, but I'll look into why that might be a problem.
I have tracking protection set up on the stricter blocklist and that tends to block certain Cloudfront URLs, probably because a lot of them are used for tracking scripts. Others are reporting that the default settings work fine, so it must be because I altered the tracking protection settings.
It's probably not something you should be necessarily worrying about.
Pretty cool build, it's crazy how powerful compact computers have gotten!