I'm going to be uploading a comic, but I can't seem to select more than one image file (I've already used BitTorrent on the .torrent file, and unpacked the .zip from that .torrent.)

I've looked at Hypnohub's "Wiki", and tried downloading the Firefox extension, but Firefox isn't letting it be installed.

Should I just upload one at a time, and hide from index for each one, or is there an easier way?

That's the only way, Chief.