Bug 840705 and bug 840699 updated the default value of protocol handlers and the gecko.handlerService.defaultHandlersVersion. From bug 840705 comment 25 However, while the new Yahoo https handler is added when incrementing gecko.handlerService.defaultHandlersVersion, Firefox will continue to use the old http URL until the user manually changes the mailto handler to the new Yahoo https handler. We should remove the old one and set to the new one if user sets the old one as default before.
Editting the subject, beacause it sounds like you meant "should be removed" not "should not removed".
Summary: The old default protocol handler should not removed when a new default one is added. → The old default protocol handler should be removed when a new default one is added.
No longer blocks: 950073
Whiteboard: p=0 → p=2
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