Hey there. Would you mind sending me the image you're trying to upload to andrew (Our Supreme Lord and Overseer)@indentlabs.com? It looks like you're following the right path to upload an image (editing a page, selecting an image, and then clicking the Save button), but there are a few types of images that have been throwing errors on save. I haven't figured out what is causing the latter issues, so I'd love to get my hands on an image that is throwing errors so I can figure out why – and fix it.
Both Chrome and Firefox should be totally fine to use; I think this is just an issue I need to fix. Sorry for the inconvenience and confusion; hopefully I can get it sorted out and then everything will magically just start working for you!