Examine source code of GitHub Unfold News

{
  "description": "Auto unfold news on GitHub dashboard.",
  "version": "0.1.2resigned1",
  "manifest_version": 2,
  "name": "GitHub Unfold News",
  "author": "xxhomey19",
  "content_scripts": [
    {
      "matches": [
        "https://github.com/"
      ],
      "js": [
        "contentscript.bundle.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "img/icon-64.png"
  },
  "icons": {
    "16": "img/icon-16.png",
    "64": "img/icon-64.png",
    "128": "img/icon-128.png"
  },
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "browser_specific_settings": {
    "gecko": {
      "id": "{78d867e7-efb5-4633-8148-611ebe1c7674}"
    }
  }
}