[vidyava]

If you're using a browser with heavy anti-fingerprinting capabilities it will upload a randomized canvas image instead of the intended image, and you'll get a lot of descriptions of pictures of wavy lines and no people.

[throwaway81523]

That is weird, I upload photos from the exact same browser to other sites all the time and they look fine. Uploading a photo shouldn't touch the canvas. It's just an http post.

[bool3max]

I find that hard to believe. Which browser intentionally tampers with images before they are uploaded, especially in such a destructive manner?

[oynqr]

Firefox with canvas fingerprinting protection enabled.