Comment 2 for bug 425464

To be a bit more clear, when a URI is dragged-and-dropped onto go-home-applet, if the URI begins with "http", then the launcher will add it to the favorites as usual (with a default icon) and, if gnome-web-photo exists, it will spawn gnome-web-photo async with the right args to create a thumbnail of the website and save it in the launchers cache. Once the thumbnail is ready, the launcher reads it in and replaces the temp icon with the thumbnail.

So, for each favorite, gnome-web-photo is only called once and isn't called at startup or at any other time apart from when new URL's are added.

We need the code-paths that deal with the webfav to do the same, i.e. try and make a thumbnail and only use the favicon if that fails.