Maybe the URLs were being fetched from your history cache? I had to clear my cache to get rid of them and start afresh.-IainB
I don't have Pale Moon, (or Firefox), set to use a persistant cache, (disc cache disabled), it's purely RAM based which is cleared every time it exits - which I had to do to install HTTPS Finder, (exit that is). But I also cleared what little cache there was, just in case.
I thought I had it set up so that I don't automatically load any embedded media. That doesn't necessarily mean that is what is happening though! 
What would I need to do to prove that, either way?
If it's set to not autoplay then you should get the same kind of thing I get in the screenshot above, (apparently Pale Moon only).
AFAIK, the only thing I'm doing to achieve that are what you mentioned
here and the one I mentioned
here - not running any addons to block any media automatically playing.
ADDENDUM: OK, it appears as if it's a "feature" of
Pale Moon - I just downloaded the portable version and ran it with no addons and no changes to default settings except for the two about:config entries mentioned. If I then go to DC in HTTPS, the media is displayed as per my screenshot. In Firefox, you get what you said - nothing.
So, my bad, sorry
