Huh. The superold-school Firefox permissions.default.image=2 hack doesn't work with modern html, specifically the srcset field of the img tag, in some instances, here on Mastodon.
I read through the bug report/implementation log at https://bugzilla.mozilla.org/show_bug.cgi?id=870021. It's from about 5 years ago, covering about a 2 year period.
Someone else noticed this problem, and it has been allegedly fixed, recorded here: https://bugzilla.mozilla.org/show_bug.cgi?id=1196784.
Video tags also load, but that's a cockpit error on my part, I think.
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