I need to combine functionality available only in a Chrome packaged app (access to syncFileSystem) and functionality available only in a Chrome extension (injecting a script into a 3rd party website).

It seems that neither a packaged app nor an extension can achieve both these things, so I'm now considering trying to achieve what I'm after with a separate packaged app and extension communicating.

I see that Chrome's documentation explains how two extensions can communicate via chrome.runtime.onMessageExternal.addListener and chrome.runtime.sendMessage, but nothing about packaged apps and extensions communicating.

Does anyone know if this is allowed? Is there any documentation, or a working example out there?

javascript google-chrome google-chrome-extension google-chrome-app
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