'fileSystem' is only allowed for packaged apps, and this is a legacy packaged app

Question

I need to use the fileSystem permission in the manifest.js, so I can read/write files from my Chrome extension.

When I load my extension with the \"Load unpacked ext

Answer 1

Packaged apps have a different structure in the "app" section of the manifest. Your manifest.json would be something like:

{
  "name": "MyApp",
  "version": "1.0",
  "manifest_version": 2,
  "app": {
    "background": {
      "scripts": [
        "main.js"
      ]
    }
  },
  "icons": {
    "128": "favicon.ico"
  },
  "permissions": [
    "fileSystem"
  ]
}

and you would also need a background script ("main.js" in this sample) that opens your index.html when the user clicks on the app icon:

chrome.app.runtime.onLaunched.addListener(function() {
  chrome.app.window.create('index.html', {
    bounds: {
      width: 500,
      height: 300
    }
  });
});

Answer 2

Add this to your manifest:

"manifest_version": 2,