How can I save the page with the interactive animations to my computer?

I'm using

  wget --page-requisites \
       --span-hosts \
       --execute robots=off \
       --adjust-extension \
       --convert-links \
       https://ciechanow.ski/mechanical-watch/

but I get "Loading..." messages in place of the animations when I open the saved html on Firefox.

Uncle Tungsten by Oliver Sacks. I'm a chemist trying to turn physicist and the childish enthusiasm of little Oliver (he's around 11--13 in the book) for “the lovingly detailed, naturalistic, descriptive chemistry of the nineteenth century” makes me feel less remorseful about my choice.