SVG <image> tag inlined in HTML not loading image in browser

You need to use:

<image ... xlink:href="...">

See the SVG Document Structure spec.

This is not the case in question, but I ran across a similar issue with an <image href="/path/to/file.svg"> tag not showing up in Edge, while working correctly in Firefox and Chrome.

It turns out that if you don't explicitly set both a height and a width attribute on the <image> tag Edge won't show the image. This is not the case in Chrome and Firefox where width alone was enough.