Add images (by reference) from external web locations as opposed to embed/upload image
Give the chance to not load MindMup with embed images and allowing reference to external locations.
Furthermore, allow to manually edit the URL of external source.
before this starts getting votes, please note that default browser security settings mean that all such maps will break PDF export, image export, html export and probably a ton of other things. using external images from sites that do not allow cors creates a ‘tainted canvas’ (https://developer.mozilla.org/en-US/docs/HTML/CORS_Enabled_Image)
So how does that draw.io and coggle.it (both also Google Drive Apps for Business) can do this without any problem?