How do I change the icon of a Epiphany web app?

The webapps just take a thumb of whatever image they can find on the page, can I customise it?

For Gnome-Shell (Ubuntu 12.10), the image is located at ~/.config/epiphany/app-epiphany* (where the * in app-epiphany* is the web app name followed by and some additional numbers/letters)

Replace the image file called app-icon.png in ~/.config/epiphany/app-epiphany* or ~/.gnome2/epiphany/app-epiphany* (where the * in app-epiphany* is the web app name followed by and some additional numbers/letters).

For instance, for a webapp called coolap, it could be ~/.config/epiphany/app-epiphany-coolapp-12512912r1unr1i25n124/app-icon.png.

Then restart Unity (ALT+F2 ,then type “unity” and press ENTER) or GNOME Shell (ALT+F2, type "r", ENTER).

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