From: http://dev.faqly.com/faq/view/id/12 on login action

[Exception... "'Permission denied to call method Window.setTimeout' when calling method: [nsIDOMEventListener::handleEvent]" nsresult: "0x8057001e (NS_ERROR_XPC_JS_THREW_STRING)" location: "<unknown>" data: no]
[Break on this error] undefined
[Exception... "'Permission denied to call method Window.setTimeout' when calling method: [nsIDOMEventListener::handleEvent]" nsresult: "0x8057001e (NS_ERROR_XPC_JS_THREW_STRING)" location: "<unknown>" data: no]