(1) What do you mean by the "default" setting? The extension provides two buttons/menu items in Firefox, one for link and one for copy (AFAIK neither one is a default). For generic import operations such as the global import hotkey, drag/drop, and copy/paste, the default is actually link, but can be made copy by checking Tools | Options | Import | Store contents when importing files and Outlook items.
(2) The indicators for a stored item are:
a) Item title in Item Details pane suffixed with [Stored]
b) Store Contents button on Item Toolbar/Menu depressed
c) Existence of Document Size attribute (if shown at Tools | Options | Attributes)
|