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I'm wondering if Firefox can indicate that a webpage should be loaded but without network access (at least beyond its own directory). The purpose is to allow a file to conduct postMessage communications with a privileged add-on, but without there being any privacy concerns.

Brett Zamir
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  • Where would that webpage come from? file:, chrome: or something like that. Or do you want a regular web-page not to (dynamically) load additional scripts? – nmaier Aug 21 '13 at 23:18
  • The webpage would come from file:. And right, not to dynamically load additional scripts or even redirect to http, insert images in http, etc.--i.e., anything that could be used to pass on data obtained by the file's postMessage communications with my add-on back to a server. – Brett Zamir Aug 21 '13 at 23:30
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    Ah, OK. I'd think messing around with the `nsIPrincipal` attached to the document might work, or messing around with `nsIContentPolicy`... But I don't have an answer off the top of my head to that. – nmaier Aug 21 '13 at 23:43

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