I have reported few problems with interfaces uuid’s.
It would be good to consider if they should or not blocking gecko 1.9.1
Bug: Interface name
475897 imgIContainer
475898 jsdIDebuggerService
475900 nsIAbDirectoryQueryArguments
475901 nsIAccessibleValue
475912 nsITokenDialogs
475913 nsIXULWindow
475915 nsPIWindowWatcher
I thing these are related to Thunderbird but I'm not sure
475909 nsIMailtoUrl
475903 nsIFolderListener
475904 nsIImapMailFolderSink
475906 nsIImportMail nsIImportMailboxDescriptor
475907 nsINNTPNewsgroupList
Thanks
Filed https://bugzilla.mozilla.org/show_bug.cgi?id=477166
-Boris