Embedding Base64 Images

Purely out of curiosity, which browsers does Base64 image embedding work in? What I’m referring to is this.

I realize it’s not usually a good solution for most things, as it increases the page size quite a bit – I’m just curious.

Some examples:

HTML:

<img alt="Embedded Image" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADIA..." />

CSS:

div.image {
  width:100px;
  height:100px;
  background-image:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADIA...);
}