Examine source code of GRAB AR

{
  "name": "GRAB AR",
  "version": "4.0.0.1",
  "manifest_version": 2,
  "description": "GRAB AR QR Code Generator",
  "homepage_url": "https://grabar.app",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "default_locale": "en",
  "permissions": [
    "tabs",
    "storage",
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "js/background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "css": [
        "src/inject/inject.css"
      ]
    },
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "js/jquery/jquery.js",
        "qrcode/jquery.qrcode.min.js",
        "qrcode/qrcode.min.js",
        "src/inject/inject.js"
      ]
    }
  ]
}