Account picture formats

[obfuscoder]

The FedCM spec does not seem to mention what formats/mediatypes are accepted for the account picture. I think IdPs as well as browser vendors would need to know what they can use or need to support. For instance, would the content type image/svg+xml be an acceptable image format?

[npm1]

Yea, it would be valuable to make this more explicit. For what it's worth I don't see any content type checks in our code for this image fetch so I imagine that one would be accepted.