Image in HTML title tag but not a favicon

Question

I know how to use a favicon but I mean something else: There must be a way to use images in html title tags see this page as an example: http://helios.io/

How is this little rockets right of the title text added?

Answer 1

You cannot use images in a title, not in the traditional sense of JPG, PNG, GIF, etc.

The little rocket ship that you see is a text character that can be 'typed'. There are numerous little characters you can type that way.

However, I believe the rocket ship you see is a Mac / iOS only character... as it's an emoji rocket ship.