Cannot pan or scroll within element of webpage on some sites

[freebrowser1]

Some webpages have inner iframes but the user cannot scroll inside these frames.
Here an example: http://apolloarchive.com/apollo_gallery.html .
Open that page and click on any Apollo mission, e.g. Apollo 11.

Then the bottom half of the browser will show a clickable list of images or other media. But the user cannot scroll in this frame. Other (desktop) browsers can scroll in this frame.

Another example: https://wikisky.org/ (no frames).

This is a photograpic map of the sky which opens with an image of the Andromeda galaxy M31. Regardless of the object shown, panning is not possible. I tried with two fingers, holding a finger for a second and then swipe, but panning did not occur.

Other browsers allow panning the sky viewer.