@freddy This is what I believe a native FF log message resulting from an attempt to load from localhost:
"Local Network Access permission required: top-level site “https://infosec.place/”, initiator “https://infosec.place/”, attempting to access target “http://localhost:3000/assets/images/og-card.png” (127.0.0.1:3000) via http. Secure context: True"
I could reproduce it by scrolling a shit ton in my timeline (won't do again), but I think a minimal test case would be a simple `img src="http://localhost...` served from a non-local origin.
In that case though the source would be there in Inspector, but in case of Akkoma infinite scroll does some magic that prevents me from simply looking up the tag by URL, that's why I'm thinking if some kind of "stack trace" is available for network events that would lead me to the offending element?