[whatwg] registerProtocolHandler - allow site to specify more info and do custom handling

João Eiras joaoe at opera.com
Tue Sep 22 06:54:12 PDT 2009

> 2. The location of an icon like a favicon.ico file or png etc.

This is actually a real privacy issue. The user agent would periodically fetch a remove favicon, which discloses the end user's ip.
If any, such favicon would need to be made available offline immediately when installing the protocol handler, or a data uri could be used.

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