This will need XPCOM work to expose a way of doing this to nsIFile(Win), and then downloads work to call that API instead of `.launch()`. :toshi or :emk, are either of you interested in working on this?
Bug 1605308 Comment 7 Edit History
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This will need XPCOM work to expose a way of doing this to nsIFile(Win), and then downloads work to call that API instead of `.launch()` - but only on executable files. :toshi or :emk, are either of you interested in working on this? Edit: alternatively, `launch` could do the right thing internally...