This is interesting - it cropped up on a Ricoh Theta Facebook group that I’m a member of. If you tag an image with equirectangular, it will turn it into a viewable panorama.
https://www.flickr.com/photos/hairydale ... nisforums/
I uploaded a few to my Flickr stream, and added them to the x404 Flickr group.
https://www.flickr.com/groups/dennisforums/